Ebony is a dense black/brown hardwood, most commonly yielded by several species in the genus Diospyros,  which also contains the persimmons. Ebony is dense enough to sink in water. It is finely-textured and has a mirror finish when polished, making it valuable as an ornamental wood.[1] 
<a href="//commons.wikimedia.org/wiki/User:Challiyan" title="User:Challiyan">Challiyan</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>