metamorphic
Green Adventurine
Quartzite (Silicon Dioxide) SiO2 with Fuchsite inclusions
Hardness: 6.5-7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69.
- Hardness
- 6
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69.
Formation & geological history
Formed through the regional metamorphism of quartz-rich sedimentary rocks (sandstone) combined with the presence of mica-like fuchsite inclusions, which provide the green color.
Uses & applications
Primarily used in jewelry (beads, cabochons), ornamental carvings, figurines, and as a popular stone for tumble polishing and metaphysical collections.
Geological facts
The shimmering effect called aventurescence is caused by light reflecting off tiny platelets of green chromium-rich mica known as fuchsite within the quartz matrix.
Field identification & locations
Identify by its characteristic 'sparkle' under light and its green hue. It is commonly found in India, Brazil, and Russia. It can be distinguished from jade by its lower toughness and the presence of glittering inclusions.
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