Green Aventurine
Quartz var. Aventurine · Semi-Precious Gemstone
Crystal System
Trigonal, habit is typically massive or in granular quartz aggregates
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2 with fuchsite inclusions
Formation Process
Hydrothermal and magmatic processes, forming within pegmatites and quartz veins with entrapped platy mineral flakes
About This Crystal
A smooth, tumbled, pebble-shaped gemstone of an opaque to translucent sea-green or forest-green color with a waxy to vitreous luster and characteristic shimmering metallic inclusions known as aventurescence
Physical Characteristics
Green body color with a white streak, conchoidal fracture, cleavage absent, specific gravity around 2.65, brittle tenacity, and no significant fluorescence
Optical Properties
Singly or doubly refractive depending on aggregate orientation, refractive index around 1.544 to 1.553, exhibiting aventurescence due to light reflecting off internal mineral platelets
Hardness & Durability
Origin Region
India, Brazil, Russia, and Austria, typically forming in metamorphic or pegmatitic environments
Hardness & Durability
Mohs hardness of 7, good durability and toughness, suitable for general jewelry wear though vulnerable to scratching glass or harder quartz
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid harsh chemicals or prolonged direct sunlight to maintain color integrity
Rarity & Value
Common and widely accessible, affordable in tumbled and carved forms, with value depending on color saturation and density of the shimmer effect
Special Characteristics
Aventurescence, a glittering or gleaming effect caused by light reflection from microscopic plate-like inclusions inside the stone
Lore & History
Historically used as a talisman for luck, prosperity, and opportunity, traditionally associated with the heart chakra in modern crystal healing practices