mineral

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

AI-generated identification · may be incorrect

Reddish-brown, opaque, glassy material with abundant fine copper-colored glitter; no natural crystal structure or cleavage. Hardness is approximately 5.5–6.5 Mohs, with a vitreous luster and moderate density around 2.4–2.6.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Goldstone is manufactured by cooling silica-rich glass containing copper particles under controlled conditions; it is not a naturally formed rock and has no geological age. The photographed pieces are polished jewelry cabochons and beads.

Uses & applications

Used extensively for inexpensive pendants, beads, cabochons, ornaments, and decorative objects. It is generally valued for its sparkle rather than rarity.

Geological facts

The glitter results from reflective metallic copper crystals trapped in the glass. Red/brown goldstone is commonly called aventurine glass or sandstone glass, though it is unrelated to natural sandstone.

Field identification & locations

Identify it by its uniform color, smooth polish, glassy body, and evenly distributed metallic sparkles; natural aventurine quartz is harder and shows quartz-like translucency and texture. Commonly produced in China, India, Italy, and elsewhere.