mineraloid / man-made material
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
Hardness: 5.5-6 (Mohs scale); Color: reddish-brown with sparkling metallic inclusions; Luster: Vitreous; Crystal Structure: Amorphous (glassy); Cleavage: None (conchoidal fracture); Specific Gravity: 2.5-2.8
- Hardness
- 5
- Color
- reddish-brown with sparkling metallic inclusions
- Luster
- Vitreous
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Physical properties
Hardness: 5.5-6 (Mohs scale); Color: reddish-brown with sparkling metallic inclusions; Luster: Vitreous; Crystal Structure: Amorphous (glassy); Cleavage: None (conchoidal fracture); Specific Gravity: 2.5-2.8
Formation & geological history
Created via a reduction-atmosphere melting process where copper crystals are precipitated out of molten glass. While often associated with 17th-century Venice (Murano), archaeological evidence suggests similar glassmaking techniques existed during the Roman Empire.
Uses & applications
Primarily used in jewelry, small carvings, and decorative crafts. It is a popular 'gemstone' for metaphysical collection due to its visual appeal and historical association with alchemy.
Geological facts
Also known as 'Monk's Gold' or 'Stellaria,' legend says it was discovered by accident when Italian monks spilled copper filings into molten glass. It is one of the few synthetic materials commonly sold in rock shops alongside natural minerals.
Field identification & locations
Identify in the field by its uniform sparkle (aventurescence) and reddish-brown glass base; unlike natural sunstone, the sparkles are perfectly even and triangular/hexagonal under a loupe. It is commonly found in retail metaphysical shops globally.
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