Everything precious about agar wood begins with an injury.
The source trees are Aquilaria species, Aquilaria sinensis and relatives, fragrant trees native to the forests of Southeast Asia and southern China. A healthy Aquilaria is ordinary: light, pale, unscented wood. The treasure forms only when the tree is wounded (by storm, by insect, by axe) and infection takes hold. The tree responds by flooding its heartwood with a dark, dense, aromatic resin. Tens of years later, if the tree survives, that resin-soaked heartwood is agar wood (沉香, chen xiang, literally "sinking incense," after the way resin-rich pieces sink in water).
The Traditional Picture, and the Modern One
Older texts describe a single mold species doing the work. Modern research shows a more complicated ecology: wound response first, then colonization by various fungi and bacteria over years, the resin accumulating layer by layer in the living heartwood. What hasn't changed: there is no way to rush it, and the tree must be alive and resisting for the good resin to form.
Wild, Planted, and Inoculated
- Wild agar wood: harvested from naturally infected forest trees. Now extremely rare. Aquilaria species are CITES Appendix II listed, and wild harvest is restricted or banned across most of their range.
- Inoculated plantation wood: the modern standard: trees are deliberately wounded and inoculated, then harvested after a set number of years. Quality varies enormously with technique, patience, and species.
- "Pressed" or synthetic: low-end market filler: powder, binder, and oil pressed into shapes. Real agar wood is never uniform. See "how to tell" below.
From Log to Bead
- Harvest and dry: the wood is cut, trimmed of resin-free sapwood, and dried for months to years.
- Grading: pieces are tested for resin density. The classic test: drop it in water. Sinking (沉水, chen shui) grade is the highest. Semi-sinking and floating grades follow.
- The blind cut: here is what makes carved agar beads a gamble and an art. The resin patterns ("Buddha eyes," heaven's lines, cloud swirls) form inside the wood, invisible from the surface. The carver slices and shapes without knowing what the grain will reveal. A plain log can hide a masterpiece. A promising log can open to nothing. This is why two beads of identical size can differ in price by a hundredfold, and why masters command what they do.
- Carving and finishing: beads are rough-turned, rested (fresh-cut agar wood can crack as it dries), then finished by hand. No lacquer, no oil finish. The wood's own resin is the polish.
How to Tell Real Agar Wood
- Scent, not shine. Real agar wood smells complex (sweet, woody, faintly medicinal), and the scent deepens with warmth (wear it against your wrist). Pressed product smells flat, sharp, or perfumey, and the smell doesn't evolve.
- Weight and sink. Dense, resin-rich wood feels heavy for its size. The sink test remains the classic grade check.
- Irregularity. Natural resin distribution is uneven: dark streaks, eyes, and clouds against paler wood. Perfect uniformity is a warning sign.
- Price. Genuine sinking-grade agar wood has historically exceeded the price of gold. If a deal seems impossible, the bead isn't what it claims.
A Note on Sourcing
Because wild Aquilaria is endangered, legitimate agar wood today comes from cultivated, inoculated trees under CITES permits. We source accordingly, and we're glad the law insists on it.
Related: Agar Wood · Caring for Agar Wood · Tibetan vs. Modern (same honesty approach)