metamorphic
Green Aventurine
SiO2 (Quartz) with inclusions of Fuchsite
Hardness: 7 Mohs scale; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (granular aggregate); Specific Gravity: 2.64-2.69.
- Hardness
- 7 Mohs scale
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs scale; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (granular aggregate); Specific Gravity: 2.64-2.69.
Formation & geological history
Formed primarily in metamorphic rocks where high heat and pressure recrystallize quartz-rich sediments. The green color and glittery sparkle are caused by chrome-rich mica (fuchsite) inclusions during formation.
Uses & applications
Commonly used for lapidary work, cabochons, beads, decorative carvings, and as a popular 'healing stone' in metaphysical collections.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to an accidental 18th-century discovery of aventurine glass (goldstone) which this natural mineral resembles.
Field identification & locations
Identified in the field by its distinct green color and the 'sparkle' produced by mica inclusions. Major sources include India, Brazil, Russia, and Tanzania. Unlike emerald or jade, it usually has a more granular/sugary texture.
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