You haven't seen all the exotic stones yet. Here's one for the newbie list. It's called slate pyrite. Ashlee Simpson wears it to a Throwback Thursday Bash At Pink Taco in Los Angeles yesterday. You need to see it closer. Here ya go.
What your'e looking at are natural pyrite growths in a matrix (host) mineral of some kind. So like rutilated quartz which is a mineral in a mineral--this one is too, only it's opaque instead of transparent like a rutile quartz would be.
LOOK OUT-- HOT STUFF
Pyrite forms in the most amazing cubic crystals in the ground. It's an iron sulfide if you care to know. And taking a cue from its highly reflective surfaces, its name is derived from a Greek word meaning fire! I guess so. Looks pretty hot from here.
Modern art? Famous sculpture? This is pyrite in its cubic crystal form as found in deposits in Rioja Spain. Ay Caramba!
Ring Courtesy: D'Orazio & Associates; 14K yellow gold, diamond and slate pyrite ring by Adeler Jewelers