It is not faceted but smooth on one side and the rest looks like it might have been dropped because its sort of sharp.It is a deep clear green like a 7 up bottle. Do you think this is all it is? How do I find out? The rocks belonged to a gemologist years ago, he died and someone bought the house and gave us a pile of 'rocks' that were in the back yard. This piece is the size of a huge avocado-it also has some white rock on a spot of it, looks chipped off.
2007-12-27 03:43:03 · 4 answers · asked by La Cicada 4 in Science & Mathematics ➔ Earth Sciences & Geology
Examine the fracture surface. If the fracture is
chonchoidal, (glass-like), it's likely obsidian,
(volcanic glass), a very fine specimen..
If the fracture has planes, it's a crystal.
If the matrix, (white rock), is limestone, it might
be an especially fine sample of glauconite.
If the matrix is granite it might be a world record
emerald, (highly unlikely), but a clear crystal of
such size might have some value.
2007-12-27 09:47:33 · answer #1 · answered by Irv S 7 · 0⤊ 0⤋
You can post photos of them on http://www.mindat.org in the identity help forum. Someone is sure to know what your rocks are.
2007-12-28 04:07:34 · answer #2 · answered by minuteblue 6 · 1⤊ 0⤋
it could be a form of volcanic glass that got fused with another mineral, you could probably find it online or at a library.
2007-12-27 13:26:57 · answer #3 · answered by ari 3 · 1⤊ 0⤋
could be peridot?
2007-12-27 21:51:10 · answer #4 · answered by deva 6 · 0⤊ 0⤋