High. The combination of the thin, yellowish sapwood on a log of this size, the dense end-grain structure, the specific bark texture, and the characteristic color transition are hallmarks of Bulnesia sarmientoi. confidence

Palo Santo (Bulnesia sarmientoi)

Bulnesia sarmientoi · Exotic/Tropical Hardwood

Type: Exotic/Tropical Hardwood
Origin: Gran Chaco region of South America (Argentina, Bolivia, and Paraguay).
Hardness: 4,500 lbf (Extremely Hard)
Durability: Very Durable. Exceptional resistance to rot, decay, and insects due to high natural oil and resin content.

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Grain Pattern

Interlocked, tight grain with a fine, even texture. The cross-section shows distinct radial streaks and a very dense, waxy cell structure.

Color & Appearance

Heartwood ranges from light olive brown to dark chocolate brown or near black, often with greenish hues. Sapwood is a pale yellow/cream color. It darkens significantly upon exposure to light and oxygen (becoming more green).

Hardness (Janka)

4,500 lbf (Extremely Hard)

Durability & Decay Resistance

Very Durable. Exceptional resistance to rot, decay, and insects due to high natural oil and resin content.

Value & Sustainability

Estimated Market Value: $40.00 - $60.00 per board foot (Highly regulated).
Wood Age Estimate: Fresh cut (less than 1 year). The light color indicates minimal oxidation, and the blade marks are prominent and sharp.
Sustainability Status: CITES Appendix II listed; IUCN Red List: Endangered. Trade is strictly regulated.

Common Uses

Incense, essential oils, small turnings, tool handles, carvings, and high-wear applications like bearings or bushings.

Geographic Origin

Gran Chaco region of South America (Argentina, Bolivia, and Paraguay).

Workability

Difficult due to extreme density and high oil content. Dulls blades quickly. Resins can interfere with glues and fasteners. Polishes to a high natural luster without much finish.

Finish Recommendations

Best left unfinished or with a light wax to preserve the natural scent. Solvent-based sealers are required if finishing is necessary to prevent oil bleed-through.