The black stones that I know of that could fit that description:
there is black alabaster (rare, couldn't find any pics of it)
Zebra marble
black marble
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy
there is black alabaster (rare, couldn't find any pics of it)
Zebra marble
black marble
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy