Aventurine
Quartz var. Green Aventurine · Semi-Precious Gemstone and Decorative Stone
Crystal System
Trigonal system, typically forming massive or cryptocrystalline aggregates
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with trace fuchsite inclusions
Formation Process
Hydrothermal and magmatic processes, forming within quartz veins and pegmatitic pockets with chromium-rich mica inclusions
About This Crystal
A polished, tumbled pebble of green aventurine displaying a mottled mix of light and dark green coloration with a characteristic shimmering or glistening effect caused by internal mineral platelets
Physical Characteristics
Green body color with a white streak, vitreous to greasy luster, translucent to opaque transparency, conchoidal fracture, and a specific gravity of approximately 2.65
Optical Properties
Singly refractive aggregate with strong aventurescence, displaying a metallic glitter caused by light reflecting off internal fuchsite or mica flakes
Hardness & Durability
Origin Region
India, Brazil, Russia, and Austria; typically found in quartz veins and pegmatites
Hardness & Durability
Mohs hardness of 7, good durability, tough due to its microcrystalline structure making it suitable for everyday jewelry
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid harsh chemicals and prolonged direct sunlight to preserve color and luster
Rarity & Value
Common and widely available, highly affordable in tumbled and carved forms, with value depending on color saturation and intensity of aventurescence
Special Characteristics
Aventurrescence, featuring a glittering metallic sheen produced by reflective inclusions trapped within the quartz matrix
Lore & History
Historically used as a talisman for luck and prosperity, associated with the heart chakra in modern crystal healing practices to promote emotional tranquility and abundance