mineral

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Hardness: 5.5-6 (Mohs), Color: Dark blue with silvery/blue sparkles, Luster: Vitreous, Structure: Amorphous glass with metallic crystals, SG: 2.5-2.8

Hardness: 5

Identified June 24, 2026More mineral →

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Physical properties

Hardness: 5.5-6 (Mohs), Color: Dark blue with silvery/blue sparkles, Luster: Vitreous, Structure: Amorphous glass with metallic crystals, SG: 2.5-2.8

Formation & geological history

Synthetic material created through a reduction-melting process, originally pioneered in 17th-century Venice (Murano glass techniques).

Uses & applications

Primarily used in jewelry, beads, figurines, and as a decorative or metaphysical stone.

Geological facts

Despite its name, it is a human-made glass. Legend says it was discovered by accident when Italian monks spilled copper filings into a vat of molten glass.

Field identification & locations

Identify by its intense internal sparkle (aventurescence) and smooth, glass-like surface. It does not occur naturally in the field.

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