Goldstone 8mm Round Large Hole 8-Inch Large Hole Yellow Opal is transparent to

Yellow Opal is transparent to opaque

a silicate of calcium and magnesium -- from western Canada

Boulder Opal is a golden-brown to dark brown stone

It forms over long periods as mineral-rich water moves through aluminous rock

and was prized in ancient times for the ultramarine dye derived from it

Goldstone 8mm Round Large Hole 8-Inch Large Hole Yellow Opal is transparent toGoldstone is a manmade material, consisting of opaque rust to red glass with tiny flecks of glittering copper suspended within it. Goldstone was first created during the Italian Renaissance when, as legend has it, a Venetian monk tipped molten copper into a vat of molten glass. When this combination crystallized, the result was glass permeated with thousands of tiny metallic sparkles.