metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 7 (Mohs scale); Color: Pale to medium green; Luster: Vitreous to waxy with 'aventurescence' (shimmer); Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.64-2.69
- Hardness
- 7 (Mohs scale)
- Color
- Pale to medium green
- Luster
- Vitreous to waxy with 'aventurescence' (shimmer)
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Physical properties
Hardness: 7 (Mohs scale); Color: Pale to medium green; Luster: Vitreous to waxy with 'aventurescence' (shimmer); Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where chromium-rich mica (fuchsite) crystallizes within the quartz matrix. Most deposits are millions of years old, found in metamorphic terrains.
Uses & applications
Used widely in lapidary work for cabochons, beads, and carvings. Also popular in landscaping, construction as an ornamental stone, and as a popular 'healing' crystal in the metaphysical community.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to the accidental discovery of goldstone glass that resembles this natural mineral.
Field identification & locations
Identify in the field by its distinct green color and the presence of tiny, plate-like mica inclusions that catch the light. It is commonly found in India, Brazil, and parts of Russia.
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