Known as either Leadwood or Black Ivory
Grown on an ethically based concession in North West Mozambique
Dark African wood, very dense very hard it darkens with age and when finished will be very similar to Ebony, hard to work but only because it is so hard, the grain isn't problematic.
The sawmill these come from is in the process of restoring the areas forest and replanting, however Leadwood is abundant in southern Africa and is commonly used as firewood. So no worries on that score.