Green Aventurine
Quartz var. Green Aventurine · Semi-Precious Gemstone
Crystal System
Trigonal, massive to granular habit with tumbled form
Mineral Group
Silicates, Tectosilicates
Chemical Formula
SiO2 with fuchsite inclusions
Formation Process
Metamorphic and hydrothermal processes involving regional metamorphism of quartz-rich sandstones with chromium-rich mica flakes
About This Crystal
Tumbled, smooth polished pebble displaying a soft pale green body color with a glittering aventurescence effect caused by tiny reflective mineral inclusions
Physical Characteristics
Light green color, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity of approximately 2.65, brittle tenacity
Optical Properties
Singly refractive, uniaxial positive with low birefringence, displaying aventurescence due to tiny platelike inclusions reflecting light
Hardness & Durability
Origin Region
India, Brazil, Russia, and Austria, typically forming in metamorphic quartzites and pegmatites
Hardness & Durability
Mohs hardness of 7, good durability and toughness, making it highly suitable for general jewelry use and tumbled stones
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid harsh chemicals or prolonged direct sunlight to prevent potential fading
Rarity & Value
Common, very affordable, widely available as tumbled stones, beads, and carved decorative items
Special Characteristics
Displays aventurescence (a glittering metallic sheen or sparkle caused by suspended fuchsite or other mineral flakes)
Lore & History
Historically associated with luck, prosperity, and opportunity, often called the Stone of Opportunity and linked traditionally to the heart chakra