Green Aventurine
Quartz var. Aventurine · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal, massive or disseminated habit
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 with fuchsite inclusions
Formation Process
Hydrothermal and metamorphic processes where quartz veins intrude into rocks containing chromium-rich micas
About This Crystal
A polished, smooth, tumbled oval stone with a gentle pale green color and a characteristic shimmering effect caused by tiny reflective mineral inclusions, displaying a vitreous to greasy luster.
Physical Characteristics
Light to medium green body color with a white streak, conchoidal fracture, lack of distinct cleavage, specific gravity of approximately 2.65, and brittle tenacity
Optical Properties
Singly or doubly refractive with a refractive index of 1.544 to 1.553, exhibiting aventurescence due to platelike inclusions reflecting light
Hardness & Durability
Origin Region
India, Brazil, Russia, Austria, and Tanzania; found in metamorphic and igneous rocks
Hardness & Durability
Mohs hardness of 7, making it durable for general jewelry use, though care should be taken against harder abrasive minerals
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals and prolonged direct sunlight to preserve surface polish
Rarity & Value
Common and widely accessible, with value depending mainly on the intensity of the green color and the strength of the aventurescence
Special Characteristics
Aventurescence (a metallic glitter or shimmer effect produced by light reflecting from small inclusions inside the stone)
Lore & History
Historically associated with luck, prosperity, and opportunity; commonly linked with the heart chakra in modern crystal healing practices as a stone of optimism and emotional calm