Rock Identifier
Green Aventurine (Aventurine Quartz (SiO2 with inclusions of fuchsite)) — mineral
mineral

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of fuchsite)

Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); SG: 2.64-2.69.

Hardness
6
Color
Pale to dark green with a shimmering effect
Luster
Vitreous
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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); SG: 2.64-2.69.

Formation & geological history

Primarily formed in metamorphic environments where quartz-rich sediments are subjected to heat and pressure, allowing chrome-rich fuchsite mica to crystallize within the quartz matrix.

Uses & applications

Extensively used in lapidary work for cabochons, beads, carvings, and tumbled stones. Also used in ornamental home decor and spiritual/metaphysical jewelry as the 'stone of opportunity'.

Geological facts

The shimmering effect seen in this stone is called 'aventurescence', which is caused by light reflecting off tiny platelets of green fuchsite mica. The name comes from the Italian 'a ventura', meaning 'by chance'.

Field identification & locations

Identified by its distinctive grainy appearance and metallic shimmer. Found commonly in India, Brazil, and Russia. For collectors, look for the 'schiller effect' which distinguishes it from green jade or glass.

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