BRAZILIAN BLACKHEART  - (Zollernia spp.)  also known as Pau Santo, native to Brazil. Tree grows from 65-100 feet tall, and 2-3 feet in trunk diameter.
Heartwood is dark brown, sometimes with a grey or green hue. Sapwood is pale yellowish, and is sharply visible from the heartwood.
Common uses are guitars (backs and sides), turned objects, and knife handles.