Aventurine
Quartz var. Aventurine · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal, massive or granular crystal habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with fuchsite or green mica inclusions
Formation Process
Hydrothermal and metamorphic processes involving quartz-rich fluids with chromium-bearing mineral inclusions
About This Crystal
A small, opaque, light-green pebble with a matte to subtly glistening surface texture, showing a granular crystalline structure
Physical Characteristics
Green body color, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity around 2.65, brittle tenacity
Optical Properties
Singly refractive with uniaxial positive optical character, displaying a glittering aventurescence due to tiny platelike inclusions
Hardness & Durability
Origin Region
India, Brazil, Russia, Austria, and Tanzania; forms primarily in quartz veins, pegmatites, and metamorphic rocks
Hardness & Durability
Mohs hardness of 7, fair toughness, good stability and wearability for general jewelry use
Care & Maintenance
Clean with warm soapy water using a soft brush, store away from harder minerals to prevent scratching
Rarity & Value
Common, highly accessible, affordable price range depending on color intensity and amount of shimmering inclusions
Special Characteristics
Aventurescence, a metallic shimmering or glistening effect caused by light reflecting off enclosed micro-platelets of fuchsite
Lore & History
Historically used as an amulet for luck and prosperity, associated in modern crystal healing with the Heart Chakra and emotional tranquility