Rock Identifier
Green Aventurine (Aventurine (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral
mineral

Green Aventurine

Aventurine (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Hardness: 6.5-7 on Mohs scale; Color: Forest green to sea green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69. It features a characteristic 'aventurescence' or shimmering effect caused by platy inclusions of green fuchsite mica.

Hardness
6
Color
Forest green to sea green
Luster
Vitreous to waxy
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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Forest green to sea green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69. It features a characteristic 'aventurescence' or shimmering effect caused by platy inclusions of green fuchsite mica.

Formation & geological history

Formed in magmatic and hydrothermal environments, often found within pegmatites or metamorphic rocks where quartz recrystallizes around mica inclusions. Geological age varies by deposit, typically ranging from hundreds of millions to billions of years old.

Uses & applications

Primarily used as a semi-precious gemstone for jewelry (cabochons, beads), decorative carvings, aquarium gravel, and within the metaphysical community as a stone for 'good luck' and prosperity.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the 18th-century discovery of aventurine glass (Goldstone) which was an accidental creation that resembles the natural stone.

Field identification & locations

Identify in the field by its green color combined with a grainy texture and sparkling internal reflections. It is commonly found in India (the largest producer), Brazil, Russia, and Austria. Collectors should look for even color distribution and strong shimmering effects.

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