Réunion Tamarin Acacia

Réunion Tamarin Acacia is the timber of Acacia heterophylla, a large highland tree endemic to Réunion Island (with a small population on Mauritius) in the Mascarenes of the western Indian Ocean. Locally it is known as tamarin des Hauts — "tamarind of the highlands" — a name that reflects the leaf-shape resemblance to true tamarind rather than any botanical relationship; it is a wattle/acacia, not a Tamarindus.

Botanically it is a remarkable species: genetic work places it as an extremely close relative of Hawaiian koa (Acacia koa), the result of a long-distance dispersal event across the Pacific and Indian Oceans, and it also strongly resembles Tasmanian blackwood (Acacia melanoxylon). The sample shown is characteristic of the group — a warm dark reddish-brown heartwood set off by a pale cream sapwood, with clear concentric growth rings and radial grain running out from the pith.

The heartwood is a warm dark reddish-brown, frequently carrying darker streaks or banding, and it is sharply distinguished from the pale cream-to-straw sapwood — the crisp light-and-dark contrast visible on the sample. Growth rings are usually visible and the grain reads radial on the face. Like its acacia relatives, the wood commonly shows attractive figure, including fiddleback (curly) and mottle, and it takes a high natural luster.

Grain runs from straight to wavy or interlocked, the interlock being what produces the prized curl. Texture is medium and fairly even. It is a moderately dense hardwood, roughly 40–43 lb/ft³ (about 640–690 kg/m³) at 12% moisture, with a Janka hardness in the region of 1,100 lbf — medium-hard, comparable to walnut and its cousins koa and blackwood, and appreciably softer than oak or hard maple.

Natural durability is moderate: the heartwood is only moderately decay-resistant and is not suited to ground contact or sustained exterior exposure, while the pale sapwood is perishable and prone to insect attack.

On Réunion the wood has long been a flagship local cabinet timber, used for fine furniture, casework, tables, chairs, and traditional joinery, where its color and figure are shown off. Figured stock is highly valued for decorative veneer, marquetry, and inlay, and it is a staple of the island's craft and souvenir woodworking.

Beyond furniture it is used for flooring and interior paneling, turned bowls and treen, small carved objects, and tool and knife handles. As a near-relative of koa and blackwood it has the tonal qualities associated with those instrument timbers and is occasionally used for stringed-instrument backs, sides, and decorative components where local material is available.

The wood generally works well with both hand and machine tools, but the wavy and interlocked grain responsible for its figure can tear out during planing and molding; sharp tooling, a tight cap iron, and a reduced cutting angle help on figured boards. It turns cleanly, glues soundly, and takes an excellent polished finish thanks to its naturally high luster. It holds fasteners well and is reasonably stable once properly seasoned.

Caution: like many acacias, this wood should be treated as a respiratory and skin sensitizer. The fine sanding dust can cause irritation, dermatitis, and asthma-like symptoms in sensitized workers, so dust extraction and a respirator are advisable. There is no strong characteristic scent to the wood itself. The species carries no CITES listing.

Réunion Tamarin Acacia is essentially a local specialty timber. Because the tree is endemic to a single small island and much of its highland forest is protected within Réunion's national park and UNESCO World Heritage area, commercial supply is limited and largely confined to the island itself; it is rarely exported and is uncommon on the international market.

Within Réunion it is available as lumber, turning blanks, and craft stock, with figured boards commanding a premium. Prices are best understood as those of a scarce regional hardwood rather than a globally traded species. The wood is not listed on any CITES appendix, but because the forests are ecologically sensitive and legally protected, buyers should favor material from managed, legally sourced, or plantation stock; certified (e.g. FSC) supply outside the island is scarce.