To be considered the original ebony, African Blackwood was imported and used in Ancient Egypt thousands of years ago. Even the name “ebony” has an Egyptian derivation as “hbny”—which has been shown to refer to primarily to Dalbergia melanoxylon, rather than the species which are considered to be ebony today: such as those in the Diospyros genus. In addition, African blackwood is technically in the Rosewood genus (Dalbergia), and is more stable and resistant to movement and warping than other types of ebony.
African blackwood is considered to be among the hardest and densest of woods in the world; indeed, among some 285 species tested, (including Lignum Vitae), Gabriel Janka originally found African Blackwood to be the very hardest. Unfortunately, many online sources list African blackwood’s Janka hardness at only ~1700lbf—which seems very unlikely given its confirmed specific gravity.
Workability: Very difficult to work with hand or machine tools, with an extreme blunting effect on cutters. African blackwood is most often used in turned objects, where it is considered to be among the very finest of all turning woods—capable of holding threads and other intricate details well. When made into clarinet or oboe bodies, the wood is typically processed on metal-working equipment, giving it a reputation as being metal-like in some of its working properties.