It is a very neat stone bequeathed by a family member.
I had no idea until I took the close up pictures that the stone was anything but black in color.
To the eye the stone appears deep jet black. It has a smooth, glossy and almost oily texture, but the camera lens picked up colors I had no idea were there.
The stone is not polished.
I have looked around online to try and identify it from pictures but I have not found anything that looked close enough for me to call it.
Four pictures there, flickr has a nice zoom feature that lets you look close up if you click a pic and let it load the slideshow.
If anyone has any guesses?