Common Name(s): Pau Santo, Brazilian Blackheart
Scientific Name: Zollernia spp.
Tree Size: 65-100 ft (20-30 m) tall, 2-3 ft (.6-1 m) trunk diameter
Average Dried Weight: 70 lbs/ft3 (1,115 kg/m3)
Specific Gravity (Basic, 12% MC): .87, 1.12
Janka Hardness: 3,280 lbf (14,590 N)
Modulus of Rupture: 27,230 lbf/in2 (187.8 MPa)
Elastic Modulus: 2,588,000 lbf/in2 (17.85 GPa)
Crushing Strength: 13,850 lbf/in2 (95.5 MPa)
Shrinkage: Radial: 5.0%, Tangential: 9.6%, Volumetric: 14.7%, T/R Ratio: 1.9
Color/Appearance: Heartwood dark brown, sometimes with a grey or green hue. Sapwood is pale yellowish, and is sharply demarcated from the heartwood.
Grain/Texture: Grain tends to be interlocked. With a fine even texture and excellent natural luster.
Endgrain: Diffuse-porous; solitary and radial multiples; medium to large pores in no specific arrangement, few; mineral/gum deposits occasionally present; parenchyma banded; narrow rays, spacing normal.
Rot Resistance: Rated as moderately durable to durable; good insect resistance.
Odor: No characteristic odor.
Allergies/Toxicity: Although severe reactions are quite uncommon, Pau Santo has been reported to cause skin irritation. See the articles Wood Allergies and Toxicity and Wood Dust Safety for more information.
Pricing/Availability: Very seldom available. Limited quantities of craft lumber or turning blanks may be available for a mid to high price for an imported hardwood.
Sustainability: This wood species is not listed in the CITES Appendices, and is reported by the IUCN as being a species of least concern.
Common Uses: Guitars (backs and sides), turned objects, and knife handles.
Comments: Sometimes called Brazilian Blackwheart, woods in the Zollernia species tend to be very dark colored, and very oily. The wood is sometimes used as a substitute for Lignum Vitae.
Scans/Pictures: A special thanks to Steve Earis for providing the wood sample and turned photo of this wood species.