mineral
Green Aventurine
Silicon Dioxide (Quartz variety with Fuchsite inclusions - SiO2)
Hardness: 7 on Mohs scale; Color: Light to medium mint green; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.64-2.69. Displays aventurescence (a glistening/shimmering effect due to mica inclusions).
- Hardness
- 7 on Mohs scale
- Color
- Light to medium mint green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Light to medium mint green; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.64-2.69. Displays aventurescence (a glistening/shimmering effect due to mica inclusions).
Formation & geological history
Forms primarily in igneous hydrothermal environments and metamorphic rocks where silica-rich fluids precipitate along with mica minerals like fuchsite (chromium-rich muscovite). Found worldwide including India, Brazil, Russia, and South Africa.
Uses & applications
Popularly used for polished gemstones, tumbled pocket stones, cabochons, beads, decorative carvings, and ornamental jewelry. Highly valued in metaphysical and crystal healing communities.
Geological facts
The name Aventurine comes from the Italian 'a ventura', meaning 'by chance', referencing the 18th-century accidental discovery of aventurine glass (goldstone). Green aventurine gets its signature green color specifically from microscopic flakes of fuchsite mica.
Field identification & locations
Identified by its pleasant green color, smooth quartz hardness (scratches glass), and subtle shimmering flecks (aventurescence) visible under light. Tumbled specimens like this are common in beginner rock collections.
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