mineral

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

AI-generated identification · may be incorrect

Mohs hardness about 6–7; reddish-gold/brown body with bright metallic sparkle, vitreous luster, and no natural crystal cleavage. The uniformly glittering, polished circular cabochon and pendant setting indicate manufactured glass rather than native rock.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Produced by melting silica-rich glass with copper compounds and reducing agents, allowing microscopic copper crystals to form during controlled cooling; it is not geologically aged. Natural aventurine quartz can resemble it but is much rarer in this appearance.

Uses & applications

Used for inexpensive jewelry, beads, ornaments, and decorative objects; it has little value as a mineral specimen.

Geological facts

Often called goldstone, sunstone glass, or monk’s gold; it was reportedly developed accidentally in seventeenth-century Venetian glassmaking. Its sparkle comes from metallic copper inclusions, not gold.

Field identification & locations

Identify by its exceptionally even glitter, rounded bubbles or flow textures, glassy fracture, and uniform color; natural aventurine usually shows quartz crystal texture and less regular sparkle. Commonly manufactured in China, Italy, and elsewhere.