metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
Hardness: 6.5-7 Mohs; Color: Pale green with shimmering effects; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale green with shimmering effects
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale green with shimmering effects; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed in metamorphic environments where quartz-rich sediments or igneous rocks are subjected to high pressure and heat, causing recrystallization. The green color usually comes from Fuchsite (chrome mica) inclusions.
Uses & applications
Commonly used for ornamental carvings, tumbled stones, spiritual/metaphysical healing, jewelry beads, and cabochons.
Geological facts
Aventurine is famous for 'aventurescence', a shimmering or glinting effect caused by platy inclusions within the quartz. It is often called the 'Stone of Opportunity'.
Field identification & locations
Identify in the field by its grainy quartz texture combined with internal sparkles. Large deposits are found in India, Brazil, and Russia. Collectors should look for uniform color and strong shimmering effects.
