Goldstone 1x2mm Square Rondelle - 15-16 Inch 4x2.5mm and it has been used

and it has been used throughout history for various purposes

and has been discovered with artifacts from cultures of the Neolithic Period

This material is actually Serpentine

pink and mauve

Terahertz is a spectacular man made ore

Goldstone 1x2mm Square Rondelle - 15-16 Inch 4x2.5mm and it has been usedGoldstone 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.