metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive form); Cleavage: None; Specific Gravity: 2.64-2.69. It displays 'aventurescence,' a shimmering effect caused by micaceous inclusions.
- Hardness
- 6
- Color
- Pale to dark green
- Luster
- Vitreous to waxy
Identified More metamorphic →
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive form); Cleavage: None; Specific Gravity: 2.64-2.69. It displays 'aventurescence,' a shimmering effect caused by micaceous inclusions.
Formation & geological history
Formed as a metamorphic rock, specifically a quartzite, where high pressure and temperature cause quartz grains to recrystallize. The green color is derived from tiny platelike inclusions of green fuchsite mica within the quartz matrix.
Uses & applications
Primarily used in jewelry for cabochons, beads, and carvings. Also popular in the lapidary arts, home decor (vases, bookends), and highly valued in the metaphysical community as a 'stone of opportunity.'
Geological facts
The name Aventurine comes from the Italian 'a ventura,' meaning 'by chance.' This refers to the accidental discovery of 'aventurine glass' or 'goldstone' in the 18th century, which looks similar to this natural stone.
Field identification & locations
Identify by its characteristic green color and internal shimmering flakes (aventurescence). Found commonly in India, Brazil, and Russia. Collectors should look for specimens with a high concentration of inclusions for the best color intensity.
