mineral

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

AI-generated identification · may be incorrect

Hardness: 5.5-6 (Mohs scale); Color: Reddish-brown with metallic sparkles; Luster: Vitreous to metallic; Crystal structure: Amorphous (glass); Cleavage: None (conchoidal fracture); Specific gravity: ~2.5

Hardness: 5
Color: Reddish-brown with metallic sparkles
Luster: Vitreous to metallic

Identified January 22, 2026More mineral →

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Physical properties

Formation & geological history

Goldstone is a synthetic material created in a low-oxygen reducing atmosphere. It was originally rediscovered or popularized in 17th-century Venice by the Miotti family. While the elements are geological, the form is man-made. The bracelet also features Tiger's Eye (a metamorphic rock formed via pseudomorphism of quartz after crocidolite) and Clear Quartz.

Uses & applications

Primarily used for jewelry (beads, cabochons), ornamental carvings, and by collectors of 'healing crystals' or metaphysical stones.

Geological facts

Despite its name, Goldstone contains no gold; the 'glitter' comes from tiny triangular and hexagonal crystals of metallic copper. Legend says it was accidentally discovered by Italian monks who dropped copper filings into a vat of molten glass.

Field identification & locations

Identify in the field by looking for a consistent, uniform distribution of metallic 'sparkles' (aventurescence) within a translucent glass matrix. Natural stones like sunstone have more irregular patterns. It is commonly sold globally in gem markets and craft stores.

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Metamorphic

Sandstone (with potential mineral staining/concretions)

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sedimentary

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Epidote

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metamorphic

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

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Granite

Granite (Phaneritic intrusive igneous rock)

igneous