metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Hardness: 7 (Mohs scale); Color: Pale to deep green; Luster: Vitreous to waxy with 'aventurescence' (shimmering effect); Crystal structure: Trigonal (granular); Cleavage: None/Conchoidal fracture; Specific gravity: 2.64-2.69.
- Hardness
- 7 (Mohs scale)
- Color
- Pale to deep green
- Luster
- Vitreous to waxy with 'aventurescence' (shimmering effect)
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Physical properties
Hardness: 7 (Mohs scale); Color: Pale to deep green; Luster: Vitreous to waxy with 'aventurescence' (shimmering effect); Crystal structure: Trigonal (granular); Cleavage: None/Conchoidal fracture; Specific gravity: 2.64-2.69.
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mica crystals (specifically green fuchsite) are trapped within the quartz matrix, creating its signature green color and sparkling effect.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), carvings, and as a popular stone in the metaphysical and gemstone collecting communities.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the accidental discovery of aventurine glass in the 18th century, which this natural rock resembles.
Field identification & locations
Identified in the field by its grainy texture and the 'schiller' or sparkling effect caused by mica inclusions. It is most commonly found in India, Brazil, Russia, and Austria.
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