VINTAGE Rainbow Calsilica Earring Slab Bead Pair 14x21mm
Rainbow calsilica is a colorful man-made composite material that mimics a banded mineral, introduced to the gem market in 2002.
The "Mexican Mine" Claim: It was originally marketed at the 2002 Tucson Gem and Mineral Show by a supplier claiming it was mined in Chihuahua, Mexico. It was later found to be a man made material.
