Green Aventurine
Quartz var. Aventurine · Semi-Precious Gemstone
Crystal System
Trigonal system, massive habit
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 with fuchsite inclusions
Formation Process
Hydrothermal and metamorphic processes, often forming within quartz veins or pegmatites with chromium-rich micas
About This Crystal
A polished tumbled stone of translucent to opaque light to medium green quartz, displaying a characteristic subtle metallic shimmer known as aventurescence due to tiny platelike inclusions of green mica (fuchsite).
Physical Characteristics
Light green body color, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity around 2.65, vitreous to greasy luster, brittle tenacity
Optical Properties
Uniaxial positive optical character, refractive index of 1.544-1.553, birefringence of 0.009, displays aventurescence (glittering effect caused by suspended reflective flakes)
Hardness & Durability
Origin Region
India, Brazil, Russia, and South Africa; forms in metamorphic and pegmatitic environments
Hardness & Durability
Mohs hardness of 7, good durability for everyday jewelry use though care should be taken with impact
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid harsh chemicals, prolonged direct sunlight, and ultrasonic cleaners
Rarity & Value
Common and widely available, very affordable as tumbled stones, beads, and carved items
Special Characteristics
Aventurescence caused by mineral inclusions reflecting light, creating a sparkling metallic sheen within the green body
Lore & History
Traditionally associated with the heart chakra, known as the stone of opportunity and luck, symbolizing prosperity and emotional tranquility in modern crystal healing