Green Aventurine
Quartz (variety Aventurine) with Fuchsite inclusions · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal crystal system; typically occurs in a massive habit in its raw form
Mineral Group
Silicates (Tectosilicate group - Quartz family)
Chemical Formula
SiO2 + K(Al,Cr)2AlSi3O10(OH)2
Formation Process
Metamorphic; forms as a result of regional metamorphism in schist and quartzite
About This Crystal
Medium green to light green color with a translucent to shimmering appearance due to tiny inclusions of mica. The specimen seen is carved into a mushroom shape with a polished vitreous luster.
Physical Characteristics
Green color, white streak, no cleavage, conchoidal fracture, 2.64-2.69 specific gravity, brittle tenacity, non-magnetic, piezoelectric
Optical Properties
Refractive index of 1.544-1.553, low birefringence, aventurescence (metallic glitter caused by light reflecting from fuchsitic mica flakes)
Hardness & Durability
Origin Region
Primarily India (Karnataka and Tamil Nadu), Brazil, and Russia
Hardness & Durability
6.5 to 7 on Mohs scale; good toughness, stable under normal conditions, excellent for jewelry and carvings
Care & Maintenance
Safe with warm soapy water; ultrasonic and steam cleaning usually safe. Avoid prolonged high heat and harsh chemicals.
Rarity & Value
Common; very affordable. Value is determined by color intensity and the presence of even sparkles (aventurescence). Often sold as tumbled stones or carvings.
Special Characteristics
Aventurescence: a unique optical phenomenon where mica inclusions create a shimmering or glistening effect throughout the stone.
Lore & History
Historically used in Ethiopia since the 18th century. In metaphysical lore, it is known as the 'Stone of Opportunity' and associated with the Heart Chakra and luck.