mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Hardness: 6.5–7 (Mohs); Color: Green with darker speckles; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64–2.69.

Hardness: 6
Color: Green with darker speckles
Luster: Vitreous to waxy

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 6.5–7 (Mohs); Color: Green with darker speckles; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64–2.69.

Formation & geological history

Formed in metamorphic rocks and magmatic environments. The green color is caused by platy inclusions of chromium-rich mica known as Fuchsite. Geological age varies by deposit, typically found in Precambrian formations.

Uses & applications

Commonly used for lapidary work, jewelry (beads, cabochons), ornamental carvings, and 'healing' stone collections. Historically used as a substitute for jade.

Geological facts

The name comes from the Italian 'a ventura' (by chance), referring to the accidental discovery of 'Goldstone' glass in the 18th century, which looks similar to this mineral. It exhibits 'aventurescence,' a shimmering effect caused by light reflecting off mineral inclusions.

Field identification & locations

Identify by its characteristic 'shimmer' or sparkly inclusions under a bright light. It is commonly found in India (the primary producer), Brazil, and Russia. Unlike jade, it is harder and more likely to show internal mica plates.

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