Diospyros Mun of the family Ebenaceae, the ebony family
This South East Asian wood, also known as Vietnamese ebony, is very strong, hard, and dense with irregular grain and fine texture. The color is dark green to black striping on a tan background. It is an excellent turning wood and finishes to a high natural polish due to the density.
I have no sample of this wood and no direct experience with it, so I am not clear on whether the red tint in many of these pics is correct or not, but it is widespread, so I assume it is correct.
both sides of a sample plank of mun ebony / Diospyros spp. --- HUGE enlargements are present. This sample was loaned to me by David Clark whom I thank for this and other contributions to the site. The slight difference in color between the two sides is due to the fact that the labeled side is raw and the unlabeled side is sanded down to 400 grit and has a glass-like finish.
end grain and end grain closeup of the piece directly above