Mineral (Variety of Quartz)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7 (Mohs scale), Color: Pale to deep green with shimmering specks, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (Trigonal), Cleavage: None (Conchoidal fracture), Specific Gravity: 2.64-2.69
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Pale to deep green with shimmering specks, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (Trigonal), Cleavage: None (Conchoidal fracture), Specific Gravity: 2.64-2.69
Formation & geological history
Formed in magmatic and metamorphic environments through the crystallization of silica-rich fluids. The green color and distinct 'aventurescence' (shimmer) are created by platy inclusions of green fuchsite mica. Most deposits date from various geological periods, often associated with Precambrian formations.
Uses & applications
Primarily used for decorative purposes, ornamental carvings, cabochons for jewelry, and as a popular palm stone or tumbled stone in the metaphysical and gemstone collecting markets.
Geological facts
The name 'Aventurine' derives from the Italian 'a ventura,' meaning 'by chance.' This refers to the accidental 18th-century discovery of aventurine glass (goldstone), which the natural stone resembles in its shimmering effect.
Field identification & locations
Identify in the field by its characteristic green color combined with 'aventurescence' (a metallic glitter from mica inclusions). It is commonly found in India (the primary source), Brazil, and Russia. Unlike jade, it will often show distinct sparkling specks under bright light.
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