Materia Aromatica

The Sandalwood Library

Three woods, three oils. Sandalwood read by species and origin.

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Sandalwood is usually written about as one material sold in better and worse grades. The genus Santalum holds several species that are distilled commercially, and each gives its own oil. A label that reads only "sandalwood" states the family resemblance and nothing more. The species name carries the information.

01 · The Genus

One genus, a shared chemistry, separate trees

Santalum belongs to the Santalaceae. Its species are small, slow-growing trees spread from India and the Indonesian islands across Australia and the Pacific. All share two traits that shape the oil. They are root hemiparasites, and the aromatic material is laid down in the heartwood rather than the bark or leaf. A young tree has little to distil. The oil is a product of age.

The chemistry is shared in outline. Sesquiterpene alcohols, the santalols above all, form the body of every sandalwood oil. The species divide on the balance of those alcohols and on the minor constituents that sit around them. That balance decides whether an oil reads creamy and milky, or dry, green and resinous. This library holds three species: the classical Santalum album, grown in Australian plantations; Santalum spicatum, native to Western Australia; and Santalum austrocaledonicum from New Caledonia.

Habit

Root hemiparasite

Each tree draws part of its water and nutrients from the roots of host plants nearby.

Source

Heartwood

The oil concentrates in the dense core of mature wood and is recovered by distillation.

Chemistry

The santalols

Alpha- and beta-santalol lead in every species. Their ratio, and the company they keep, separate the oils.

Side by side

3 oils at a glance

Oil Botanical name Origin Cultivation Main constituents From Availability
Sandalwood, White Santalum album Australia Conventional cis-alpha-Santalol, cis-beta-Santalol, epi-beta-Santalol,... $64.50 In stock
Sandalwood, Australian (organic) Santalum spicatum Australia Wild-crafted organic alpha-Santalol, cis-beta-Santalol, cis-Nuciferol, cis-bet... $53.25 In stock
Sandalwood, Pacific Santalum austrocaledonicum Vieill. New Caledonia Conventional cis-alpha-Santalol, cis-beta-Santalol, cis-Lanceol, cis-e... $45.75 In stock

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02 · The Range

Three oils, three species

03 · Side by Side

Species against species, one country against another

White and Australian sandalwood come from the same country and from different trees. Smelt together on blotters, they isolate the effect of species with origin held constant. The album is smooth and creamy from the opening. The spicatum opens dry, faintly green and resinous, and reaches its creamy dry-down more slowly. Cis-nuciferol and the curcumenol fraction account for much of that difference.

White and Pacific sandalwood make the reverse comparison. The two species grow far apart, yet their santalol profiles run close, and the Pacific oil is the nearer of the two alternatives to the classical album character. Cis-lanceol gives it a slightly rounder, milkier tone. Practitioners replacing album in an existing formula will find the Pacific oil the easier substitution.

The third reading is cultivation. The album here is plantation-grown; the spicatum is wild-crafted under organic certification. Holding both allows the difference in source to be shown alongside the difference in scent.

04 · In Practice

Base notes and fixatives

All three are base notes. Their sesquiterpene alcohols evaporate slowly, which makes them fixatives in natural perfumery and gives them a long presence on skin. Album and Pacific sit well beneath rose, jasmine, neroli and ylang ylang, where their creaminess carries a floral heart without competing with it. The Australian oil suits drier woody and resinous work beside vetiver, cedarwood, frankincense and patchouli, and lends structure to citrus colognes built on bergamot.

In massage blends and skincare formulation the oils are used diluted in a carrier, and a small proportion carries a long way. For diffusion, heavy alcohols of this kind lift slowly; they work best paired with a lighter top note or warmed gently. Meditation practice has drawn on sandalwood for centuries, and any of the three serves there, with the album and Pacific oils giving the quieter, more even profile.

Essential oils are for aromatic and topical use. Dilute before applying to skin. Keep out of reach of children.