Direct answer: The woody aroma family is the dry, toasty, crisp scent of aromatic timber — the backbone of classical Chinese incense — and its nine canonical constituents run from sandalwood’s milky silkiness through agarwood’s rich, tiered honeyed quality to cedar’s crisp, keen pencil-box nature. Timber is a scent nature, not a botanical category: it admits a grass root (vetiver) and a leafy herb (patchouli) beside true timbers.

Key facts: aroma.json records nine canonical constituents for this group — agarwood, benzoin, cedar, orange-peel, patchouli, sandalwood, vetiver, borneol, and pine-sap. Most of them sit in other families too: agarwood is sap-rich and honeyed, patchouli earthy and balsamic. What actually defines membership is how a botanical smells and behaves in a mixture, not whether it is literally timber.


Key Takeaways

  • Timber is the dry, toasty, crisp timber nature — the foundation of Chinese incense.
  • Nine canonical constituents, from sandalwood’s milky silkiness to cedar’s crisp sharpness.
  • Timber is a scent nature, not a taxonomy — it counts a grass root (vetiver) and a leafy herb (patchouli) among its ranks.
  • The three flag-bearers are agarwood, sandalwood, and cedar.
  • Nothing here is a health or medical claim — aroma nature is description, not therapy.

How the Family Holds Together

Direct answer: Timber hangs together not through a shared ingredient but through a shared feel — dry warmth with a crisp finish — and the nine constituents sit at different points along that feel.

The group is easier to grasp as a range than as a list. At one end sits the soft, almost milky band of sandalwood; in the middle sits the tiered, sap-rich depth of agarwood; at the far end sits the bright, pencil-keen accent of cedar. Between those three anchors, the remaining constituents find their place: vetiver leans earthy, patchouli leans balsamic, benzoin leans vanilla, orange-peel leans citrus.

That range is what makes the group useful. A maker does not pick “a timber”; a maker picks which part of the woody feel a mixture needs, and the range tells them where to reach. The nine names are nine fixed points on one continuous line, and the line, not any single name, is the group.

Editorial judgment, not a verified fact.


What “Timber” Means

Direct answer: Timber is the dry, toasty, crisp scent of aromatic timber — distinct from the sticky depth of sap and the honeyed lift of florals — and inside the group it runs a range from milky and soft (sandalwood) through rich and tiered (agarwood) to crisp and keen (cedar).

The woody nature sits on a range of three bands:

  • Milky-soft — sandalwood’s toasty, honeyed, “buttery” silkiness, the mild, long-lasting foundation.
  • Rich-tiered — agarwood’s woody, sap-rich, honeyed complexity, which develops in stages as it warms.
  • Crisp-keen — cedar’s dry, slightly honeyed-and-sap-rich accent, clearer and more pencil-box in the Juniperus forms.

Timber is the foundation family because its botanicals are long-lasting foundations that let clearer accents — florals, citrus, spices — sit on top without clashing. A floral top accent over an unstable foundation reads scattered; the same floral over sandalwood reads composed.


The Three Bands, Explained

Direct answer: The timber group is not one flat smell — it splits into milky, rich, and crisp bands, and knowing which band a botanical occupies predicts where it belongs in a mixture.

  • The milky band sits lowest and warmest. Sandalwood is its anchor: milky, mild, and almost edible in the best grades. This is the band you reach for when a mixture needs a soft landing rather than a bright opening.
  • The rich band is the prestige zone. Agarwood lives here, tiered and sap-rich-honeyed, changing shape as heat moves through it. It is expensive, frequently faked, and used sparingly for a reason.
  • The crisp band is the airy band. Cedar and thuja give that keen, pencil-box brightness that clears the nose and keeps a room feeling open.

The three bands are not rivals; they are a ladder. A mixture that uses all three — a milky floor, a rich heart, a crisp top — reads as a complete timber, not a single plank. A common misconception is that “woody” means one thing; it does not mean that at all. The skill is placing each band where it belongs.

Editorial judgment, not a verified fact.


Characteristic Chemistry (as published)

Direct answer: The timber group does not share a single molecule. What the entry pages publish is fragmentary: agarwood’s sap chemistry is described as sesquiterpenes and related compounds, and borneol is a bicyclic monoterpene; sandalwood and cedar are described only as having well-characterized essential-oil chemistry, with no named molecule.

The honest picture is that woody is a sensory grouping, not a chemical class:

  • Agarwood — the entry page states its sap chemistry is “sesquiterpenes and related compounds,” studied but never put forward as clinical evidence.
  • Borneol — a bicyclic monoterpene, and a woody constituent whose cooling side is tied to the TRPM8 cold receptor.
  • Sandalwood, cedar, vetiver, patchouli — the entry pages call their essential-oil chemistry “well characterized” or “studied,” yet name no single defining molecule.

When the corpus names no particular molecule, this page declines to invent one. The boundary worth holding: “studied chemistry” does not mean “one signature molecule,” and a family built on shared scent cannot be reduced to a shared structure.


Representative Entities

Agarwood (沉香) — the rich, tiered premium timber

Direct answer: Agarwood is sap-impregnated Aquilaria heartwood — timber that turns fragrant only after injury — woody, sap-rich, and honeyed, developing in stages as it warms, and the most prized and most heavily faked incense botanical.

What marks agarwood as different is that it is a state, not a species: a wounded Aquilaria trunk floods its own heartwood with sap over many years, and only that saturated timber becomes the prized botanical. Its woody side never stands alone — it is always tangled with the sap-rich and honeyed layers. Full detail is on the agarwood entry page.

Sandalwood (檀香) — the milky, mild foundation

Direct answer: Sandalwood is the fragrant heartwood of Santalum trees — toasty, milky, honeyed, and soft-woody, with a “buttery” silkiness in good botanical — the group’s mild, long-lasting foundation accent.

Unlike agarwood, sandalwood holds its scent in the living heartwood with no wound needed — that one difference separates the two. Its silkiness makes it the natural floor of a mixture, letting clearer accents rest above it. Full detail is on the sandalwood entry page.

Cedar (雪松) — the crisp, keen timber

Direct answer: Cedar is a dry, crisp timber accent, slightly honeyed and sap-rich; true Cedrus reads toasty and balsamic, while the “cedarwood” of trade is often Juniperus virginiana, clearer and more pencil-like.

Cedar’s crisp band hides its trap in the name: “cedar” spans at least two unrelated plant families (Pinaceae and Cupressaceae), so two things called cedar can smell rather different. Full detail is on the cedar entry page.


The Wider Timber Set

Beyond the three flagships, the rest of the group fills in around the edges:

  • Vetiver (岩兰草) — a grass root, so not a timber at all, that still reads woody, earthy, and smoky; it works as a foundation accent. See the vetiver entry.
  • Patchouli (广藿香) — a leafy herb with a woody, earthy, balsamic nature. See the patchouli entry.
  • Borneol (龙脑) — a cooling, minty-woody crystal rather than a timber. See the borneol entry.
  • Pine sap (松香) — piney, woody, and balsamic as a sap. See the pine sap entry.
  • Thuja (崖柏) — a scarce, protected endemic conifer that reads woody and cedar-like with a faint smoky depth; it sits outside the nine canonical constituents yet squarely in the group’s crisp band. See the thuja entry.
  • Benzoin (安息香) — a honeyed, vanilla, balsamic, woody sap. See the benzoin entry.
  • Orange peel (陈皮) — citrus and bittersweet, with a woody aged accent. See the orange peel entry.

A Grading Table: Reading the Nine Members at a Glance

Direct answer: The nine woody constituents fall into three functional bands — rich anchors, crisp fillers, and crossover accents — and the band a botanical occupies tells you more about how to use it than its raw scent description does.

BandMembersRole in a mixtureTypical band
Rich anchorAgarwood, sandalwoodCarry the foundation and hold the mixture togetherResin-rich-honeyed, milky
Crisp fillerCedar, thuja, pine-sapProvide the dry, airy timber floorKeen, balsamic, piney
CrossoverVetiver, patchouli, borneol, benzoin, orange-peelBridge woody to earthy, balsamic, or citrusRooty, minty, vanilla, aged-citrus

The value of the band view is that it corrects a common assumption: a botanical’s prominence is not the same as its function. Vetiver is not a “lesser timber” because it is a root; it is a crossover that pulls the woody band toward earthy smoke, which is a job agarwood cannot do. The band explains the behavior; the name does not.


How Timber Behaves on Heat

Direct answer: Timber botanicals are built for slow release — the heavier ones smolder long and quiet, while the cleaner ones brighten quickly and fade — so heat level, not just botanical choice, decides what you actually smell.

  • Low heat, long time. Sandalwood and agarwood reward a mild, sustained warmth. Too much heat and the fine top accents burn off before you notice them, leaving only the coarse smoke.
  • High heat, short burst. Cedar and pine-sap give up their bright, crisp edge fast. They are better as quick room-clearers than as slow meditative smolders.
  • The crossover rule. Vetiver and patchouli sit in the middle — they can go either way depending on temperature, which is why they bridge so many mixtures.

This is the practical payoff of the band model: a botanical’s band predicts its heat behavior. Milky and rich bands want patience; the crisp band wants a brief, hotter flash. Match the heat to the band and the timber gives you its best side; mismatch them and even a good botanical smells flat.

Editorial judgment, not a verified fact.


Timber Through the Life of a Burn

Direct answer: The same timber smells different at the start, middle, and end of a session, because the light aromatics go first and the heavy ones linger — so “a timber scent” is really three scents in sequence.

Think of a timber as a stack of volatile layers. The moment you light it, the quickest compounds leap off first; that is the bright opening. As the ember settles, the middle-weight aromatics take over; that is the body. Near the end, only the heavy, slowest compounds remain; that is the long tail of smoke. What a beginner calls “one smell” is actually this three-act arc playing out over minutes or hours.

The practical consequence for a collector: do not judge a timber on the first thirty seconds. The opening is the least honest part — it is mostly the fastest volatiles, not the material’s true depth. The middle and the tail are where agarwood and good sandalwood reveal themselves, which is why warming whole chips on gentle heat (隔火焚香) exists as a practice at all. A quick flame shows you the opening and burns off the rest; a slow warm shows you everything, in order.

Editorial judgment, not a verified fact.


Picking a Timber Material for a Blend

Direct answer: Choose a woody material by asking one question first — do you need it to lead, to support, or to bridge — because each band answers a different question and using the wrong band for the job is the most common blending error.

  • To lead, reach for the rich band: agarwood when the budget allows, or a good sandalwood when it does not. A leading timber should be layered enough to hold attention across the whole burn.
  • To support, reach for the milky band. Sandalwood is the quiet workhorse here; it lifts without competing.
  • To bridge, reach for a crossover — vetiver toward earthy, benzoin toward vanilla, orange-peel toward citrus. These pull the woody feel toward a neighbor family without abandoning it.

The error to avoid is reaching for the flagship when the blend only needs a floor. Putting agarwood under a bright floral is like laying a Persian rug under a doormat — the premium timber gets buried, and you have paid a premium price for a job sandalwood would do better. The band should match the role, not the price tag.

Editorial judgment, not a verified fact.


The Cedar Naming Trap

Direct answer: “Cedar” is the group’s most slippery label — it points to at least two botanically unrelated groups — so two products both sold as cedar can sit far apart in scent, and price is no guide to which one you have.

The two common meanings are true Cedrus (the cedars of the Mediterranean and Himalaya, in the pine family) and the American “cedarwood” oils, which actually come from junipers and other cypress-family trees. The second is the one most Western readers smell in pencil shavings and closet liners; the first reads warmer and more balsamic. Neither is “wrong,” but they are not interchangeable, and a blend recipe that works with one can fall flat with the other.

For a buyer, the lesson is to ask what the label means, not just what it says. A material described only as “cedar” tells you less than one that names a genus or a family. The trap is not that cedar is rare or costly — it is that the name is shared, so the burden of knowing which tree is yours falls on you. See the cedar entry page for the botanical split.

Editorial judgment, not a verified fact.


Timber in the Wider Family Map

Direct answer: Timber is the foundation the other aroma families stand on — floral and citrus sit above it, resinous sits beside it — so understanding woody is the prerequisite for reading the rest of the ten-family map.

The relationship is structural, not social. Florals and citruses are top-weight notes that lift; saps are middle-weight notes that deepen; timbers are the low, slow base that holds the whole thing steady. That is why the aroma families hub treats woody as the anchor and the brighter families as the accents that ride on it.

A practical rule falls out: you can omit a floral and still have a recognizable incense, but omit the timber and the burn collapses into a thin, fast flash with nothing underneath. The base is the load-bearing constituent of the composition — the part you notice least when it is right, and most when it is missing.

Editorial judgment, not a verified fact.


Buying and Storing Timber Materials

Direct answer: Timber botanicals reward the buyer who buys whole pieces rather than fine dust, and who stores them dry and dark — because both choices protect the slow, heavy aromatics that give the group its value.

The same surface-area logic that separates powder from chips (see the incense powder vs timber chips comparison) applies here. Ground material surrenders its smell fast and is easier to cut with filler; a solid chip keeps its interior sealed until heat draws it out. For anything precious — agarwood, good sandalwood — whole pieces are the form that lets you verify what you paid for.

Storage is simpler than most people fear: cool, dry, away from light and strong neighboring smells. Heat and sunlight accelerate the loss of the volatiles you wanted to keep; damp invites mould; a spice shelf next to it will trade smells. A sealed container in a cupboard is enough for most home collections, and the same rule that governs tea — keep it dry, dark, and isolated — governs timber.

Editorial judgment, not a verified fact.


Common Mistakes

  1. Judging a timber on the opening. The first thirty seconds are the fastest volatiles, not the material’s depth — the real character appears in the middle and tail of the burn.
  2. Treating all cedar as one thing. Cedrus and Juniperus are different trees with different smells; a recipe tuned for one does not transfer to the other.
  3. Paying premium prices for dust. Fine powder hides filler and loses volatiles faster; whole pieces are the verifiable, longer-lived form for anything costly.
  4. Overheating a good base. Too much heat burns off the fine top registers before you smell them; gentle, sustained warmth is what sandalwood and agarwood want.

Timber in Classical Culture

Direct answer: Woods are not just a base in a formula — they are the moral and ritual center of classical incense, valued for a slow, composed burn that the brighter families were never asked to provide.

The old manuals treat sandalwood and agarwood as the two reference materials against which everything else is measured. The imagery is telling: a timber is not admired for a quick impression but for a long, even, unhurried release — the same quality a temple ritual or a scholar’s study actually needs. A bright floral opens a moment; a timber carries a session. That division of labour, not any rule about price, is why the group earned its place at the centre.

For a modern reader, the practical takeaway is that the cultural weight of timbers is a clue about their behaviour, not an antique ornament. When an old formula leads with a timber, it is choosing endurance over flash — and if endurance is what you want, you now know where the tradition points you.

Editorial judgment, not a verified fact.


Choosing a Timber Material by Heat Source

Direct answer: Your heating method — open flame, charcoal, or electric — filters which woody materials will show their best side, so the same timber can read as ordinary or excellent depending on the setup.

  • Open flame (a stick or cone). This is a fast, hot burn. The clean band and the crossover set do well here; the deep, sap-laden materials can waste their fine top registers on the rush.
  • Charcoal buried in ash (隔火焚香). A slow, moderated heat, and the classic home for agarwood and good sandalwood. The point is to stretch the release so the layers surface one by one.
  • Electric heater. The gentlest option and the most forgiving. It is the easiest way for a beginner to hear the middle and tail of a timber without burning through them.

The rule is simple: the more you paid for the material, the gentler the heat you should give it. A cheap cedar stick can take a flame; a fine agarwood chip deserves a slow warm. Match the heat to the value and the timber repays you in layers.

Editorial judgment, not a verified fact.


Why Timber Anchors a Mixture

Direct answer: Timber botanicals are foundations — long-lasting, mild, and grounding — so they anchor a mixture and let clearer top accents (florals, citrus, spices) sit on top without clashing, which is why timbers are the foundation of classical Chinese incense.

The mixture logic follows from the aroma behavior:

  • A sandalwood or cedar foundation gives a smooth, long-lasting floor.
  • A floral or citrus top accent (see the floral family) lifts that floor.
  • A sap-rich accent (see the sap-rich family) adds depth in the middle.

The classical pairing — agarwood and sandalwood as the “two reference timbers” of Chinese incense — is exactly this: two woody foundations with different bands, one rich and tiered, one milky and mild. See the botanical comparison matrix.

The mechanism can be stated as a chain: a mixture needs an accent that evaporates slowly → a slow-evaporating accent has to be heavy and low-volatility → heavy, low-volatility aromatics are almost always timbers and saps → so the foundation of a classical mixture is woody by necessity, not by taste. That is why florals and citruses, which evaporate fast, sit on top, and why the timber group keeps showing up as the spine rather than the ornament.


The Data Layer

Direct answer: The timber group is a DefinedTerm in aroma.json, with nine memberIngredients; each constituent’s aroma frontmatter field carries the woody tag alongside its other families.

The canonical membership and the per-entry tags agree: the woody tag appears on the nine constituents in aroma.json, and each entry page’s aroma field reflects the same nature. The full ten-family map is on the aroma families hub.


Reading a Timber by What It Leaves Behind

Direct answer: Two timbers that smell alike on first light can separate sharply in the room’s after-state — the ash, the lingering note, and how long the surfaces hold the scent — and those traces are a slower but more reliable fingerprint than the opening.

Scent is the headline, but it is not the whole record. After the ember is out, each timber leaves a different residue of evidence. A resin-heavy material such as agarwood tends to leave a faintly sweet, persistent note that clings to fabric for a long while; a cleaner wood such as cedar fades from the air faster but can leave a dry, pencil-like trace on the fingers or a wooden surface. The ash tells its own story: a pure, well-aged botanical burns to a fine, light ash, while a material loaded with filler or binder often leaves a denser, grittier remnant.

For a collector who is learning to identify materials without a label, this after-state is a practical second read. The chain runs: material composition → how completely it combusts → the texture and weight of the ash → what the room smells like an hour later → a slower fingerprint of what was actually in the stick. It does not replace the nose, but it adds a layer the opening alone cannot supply.

Editorial judgment, not a verified fact.

A Substitution Matrix: When One Timber Stands In for Another

Direct answer: Timber substitution is a real practice and a real risk — a cheaper botanical can stand in for a costlier one only when its band and heat behavior line up, and the matrix below maps which swaps hold their character and which collapse.

Swapping fromStanding in withDoes it hold?What you lose
AgarwoodA good aged sandalwoodPartlyThe tiered, sap-rich layers
SandalwoodCedar (true Cedrus)PartlyThe milky smoothness, for a crisper edge
CedarPine sapMostlySlight balsamic shift
Vetiver (earthy bridge)PatchouliMostlySmoke for a balsamic lean
ThujaCedar (Juniperus)RoughlyThe faint smoky depth

The matrix is a judgment aid, not a recipe. Its message is that substitution works within a band and fails across bands — sandalwood cannot quietly do agarwood’s job any more than cedar can do sandalwood’s. The band, not the price, decides whether a swap is honest or just cheaper.

Editorial judgment, not a verified fact.

Matching a Timber to a Delivery Method

Direct answer: The way you heat a timber — stick, cone, charcoal, or electric — is not a neutral choice, because each method lands on a different part of the three-band spectrum and can flatter one botanical while burying another.

Consider two timbers that seem interchangeable on a spec sheet. A sandalwood stick and an agarwood stick both read as “woody,” yet the flame pushes both toward their fast, hot end, where the crisp top volatiles dominate and the slow, honeyed tail never gets a chance to develop. Move the same two materials onto a low electric heater, and the relationship reverses: the milky and the tiered bands unfold fully, while a material that relies on a bright, keen top note goes quiet. The delivery method is a filter, and each filter favors a different band.

The practical rule that falls out: choose the heat source for the band you actually want to hear. A crisp cedar wants a brief, hotter flash; a deep agarwood wants patience. Buying the right timber but heating it the wrong way is the most common reason a good material reads as ordinary — and it is a failure of the setup, not of the wood.

Editorial judgment, not a verified fact.

Why a Timber Smells Different on the Second Day

Direct answer: The same timber is not a stable object — it changes between the day you light it and the day after, because the lightest volatiles have already left the stick and only the heavier ones remain.

A fresh stick and a stick that has sat open for a week are subtly different materials. The mechanism is evaporation at room temperature: the smallest, fastest aromatic molecules drift off first → the remaining blend is proportionally heavier → the second-day burn reads warmer, quieter, and less “bright” than the first → a collector who burns the same stick twice may think the material changed when only the top notes left. This is why good timbers are stored sealed, and why a sealed tin is not an aesthetic detail.

The practical read is a caution against false conclusions. If your cedar stopped being “keen” after sitting out, the wood did not degrade — its keen fraction evaporated. Store it properly and the character returns to the way it was. The same logic underlies the storage rules elsewhere on this page: dry, dark, and sealed is not fussiness but the slow arithmetic of volatility.

Editorial judgment, not a verified fact.

Why a Timber Smells Different on the Second Day

Direct answer: The same timber is not a stable object — it changes between the day you light it and the day after, because the lightest volatiles have already left the stick and only the heavier ones remain.

A fresh stick and a stick that has sat open for a week are subtly different materials. The mechanism is evaporation at room temperature: the smallest, fastest aromatic molecules drift off first → the remaining blend is proportionally heavier → the second-day burn reads warmer, quieter, and less “bright” than the first → a collector who burns the same stick twice may think the material changed when only the top notes left. This is why good timbers are stored sealed, and why a sealed tin is not an aesthetic detail.

The practical read is a caution against false conclusions. If your cedar stopped being “keen” after sitting out, the wood did not degrade — its keen fraction evaporated. Store it properly and the character returns to the way it was. The same logic underlies the storage rules elsewhere on this page: dry, dark, and sealed is not fussiness but the slow arithmetic of volatility.

Editorial judgment, not a verified fact.

Reading Smoke Character as a Timber Clue

Direct answer: The way a timber smokes — thin and fine versus thick and oily — is a secondary signal about its resin load, and a careful nose can read it as a rough map of where a material sits on the three bands.

Smoke is rarely discussed as an aroma signal, yet it tracks the material underneath. A dry, clean timber such as cedar or thuja tends to produce a thin, pale wisp that clears quickly, matching its crisp band. A sap-laden timber such as agarwood burns with a denser, slightly heavier smoke that lingers and carries the honeyed layers with it. The difference is a direct consequence of resin content: more resin means more combustible mass per gram → a denser smoke column → a slower, weightier release. It is the same band logic read through the air instead of the nose.

For a buyer this is one more check that costs nothing. Before buying blind, watch how a sample smokes on gentle heat; the smoke character tells you, in broad strokes, which band you are holding — and whether the “agarwood” in front of you is behaving like a heavy sap or like a dry, resin-light filler. It is not a substitute for the nose or a lab, but it is a free first filter.

Editorial judgment, not a verified fact.

FAQ

Q: How is the woody aroma family defined?

The dry, toasty, crisp scent of aromatic timber — the foundation family of classical Chinese incense. Its nine canonical constituents are agarwood, benzoin, cedar, orange-peel, patchouli, sandalwood, vetiver, borneol, and pine-sap, listed in aroma.json.

Q: Does every woody-family constituent come from a tree?

No. Timber is a scent nature, not a botanical class. A grass root (vetiver), a leafy herb (patchouli), a crystalline monoterpene (borneol), and two saps (benzoin, pine sap) all read “woody” without being timber. The family describes how a botanical smells, not which plant part it comes from.

Q: Which botanicals represent the timber group in Chinese incense?

Agarwood (沉香), sandalwood (檀香), and cedar (雪松). Agarwood is the rich, tiered premium timber; sandalwood the milky, mild foundation; cedar the crisp, keen timber. The three are the group’s flagship bands.

Q: What separates woody from earthy?

Timber is the dry, toasty, crisp band; earthy is the heavier, darker root-and-soil band. They overlap — vetiver reads as both — but woody leans crisp and toasty while earthy leans rooted and grounded. See the aroma families hub.

Q: Is there one molecule behind the timber group?

None does. The entry pages tie agarwood’s sap to sesquiterpenes and related compounds, and call borneol a bicyclic monoterpene, but for sandalwood, cedar, vetiver, and patchouli they stop at “well-characterized essential-oil chemistry” and name no single molecule. Timber is a smell grouping, not a chemical class.

Q: Why do timbers work as incense foundations?

Because they last and evaporate slowly. A mixture wants an accent that holds the floor for the whole burn → that accent has to be heavy and low-volatility → heavy, low-volatility aromatics are almost all timbers and saps → so the woody foundation follows from physics, not fashion. That is why agarwood and sandalwood stand as the two reference timbers of Chinese incense.


Sources

  • aroma.json — the woody DefinedTerm and its nine constituent ingredients.
  • Entity pages: agarwood, sandalwood, cedar, and the rest of the group — cross-checked for aroma nature and the published chemistry statements.

Natural next step: compare the two reference timbers directly in agarwood vs sandalwood, or see the full family map on the aroma families hub.