Actually, when I took the picture, it gave it a goldfish tint. The back of the rock looks like it could possibly be lava and it's solid. I found it while digging up for a flower bed. Went down about a foot. There was a thin layer of a sandy like dirt. The closest I have found so far on my search is possible ?kimberlite? I have been digging here in the mtns a long time. Have seen a lot of crystals but not like this. It is cool to the touch, water runs right off of it, and cuts glass. Thank you for those who are helping me figure this out. I really think this piece is neat. Also, I might want to add that I found it on the base of a mtn, near an old creek bed.