Rock crystal.

[briguy]

It measures 2 1/2 inches long and 2 inches wide . It is reflectiver and the crystals seem to have diamond shape on top. Color greenish yellow. Not sure what it is. Thanks for the help.

 

[Indian Steve]

Looks like Pyrite to me.

 

[unclemac]

me too

 

[Back-of-the-boat]

Here is a picture of Fluorite.I see yellow crystals myself not golden metallic like pyrite.

 

[austin]

me three (pyrite)

 

[Lygore]

If they're square, I agree fluorite. If they aren't (dodecahedron or such), I'd think grossular garnet (they aren't just red).


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