I have forgotten all of my geology terms so I'll describe it simple...it easily breaks apart when hit with a hammer, it almost looks like glass. It splits up into shards too. It's a deep blue green color and it's really shiny and smooth.
2007-06-19 05:08:00 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Weather
Sounds like obsidian. While black is most common, it also comes in colors like you describe.
2007-06-19 05:12:48 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Well it could be apatite which is know to have that colour. It is only 5 on the Moh's scale so it should break apart easily under a hammer. It has a tabular crystal structure and an indistinct cleavage which could explain the shards when broken.
Without seeing it though i can't know for sure.
2007-06-19 12:12:42 · answer #2 · answered by Lady Geologist 7 · 1⤊ 0⤋
Sounds like Obsidian to me.
2007-06-19 15:13:31 · answer #3 · answered by parrothead_usn 3 · 1⤊ 0⤋
Could be obsidian (volcanic glass)
2007-06-21 08:20:01 · answer #4 · answered by njdevil 5 · 0⤊ 0⤋
It's either shale or it could be mica.
2007-06-19 13:25:57 · answer #5 · answered by comicfreak33 3 · 0⤊ 0⤋