what is the name of the rock that looks like ground pennies?

Question

I got a pretty rock that looks like ground up pennies as a gift. Does anyone know what it's called? I've seen the stone used in jewelry...I just wish I knew what it's called. Thanks.

Answer 1

I believe it is called "goldstone" and it is merely metallic flakes in a resin matrix, perhaps glass. There is a copper coloured variety and a blue variety that I have seen. It is pretty but has no real value.

Answer 2

Goldstone? Goldstone is a type of glass made with copper or copper salts in the presence of a reducing flame. The most common form of goldstone gives the illusion of being reddish-brown, although in fact that color comes from the copper crystals and the glass itself is colorless. Some goldstone variants have an intensely-colored glass matrix-- usually blue or violet, more rarely green-- and a more silvery appearance to the suspended crystals, whose color may be partially masked by the glass or which may be based on different metals than copper (perhaps cobalt, manganese, or chromium).The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone, and in fact goldstone is often mistaken or misrepresented as a natural material.

Answer 3

If you have seen the stone in jewelry it is probably the semi-precious mineral garnet.

Answer 4

i think i know what you mean. the 'stone' i'm thinking of is actually a kind of glass made in Italy. it's copper-coloured, glittery, as if it was full of tiny metallic particles? i've just heard it called 'copper stone', if i remember correctly.

Answer 5

I don't know but if you take it to a jeweler or have a teacher of earth sciences look it they can tell you

Answer 6

iron pyrite?