Green Aventurine
Quartz var. Aventurine · Semi-Precious Gemstone
Crystal System
Trigonal, typically occurring in massive or quartzite aggregates
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with fuchsite or green mica inclusions
Formation Process
Metamorphic or hydrothermal processes involving the regional metamorphism of sandstone containing chromium-bearing fuchsite flakes
About This Crystal
A tumbled, smooth, rounded pebble-shaped gemstone displaying an opaque to translucent light green body color with a characteristic sparkling or glittering effect known as aventurescence, caused by included platy minerals.
Physical Characteristics
Light to medium green body color with white streak, uneven to conchoidal fracture, no distinct cleavage, specific gravity of approximately 2.65, and a vitreous to greasy luster on the polished surface
Optical Properties
Uniaxial positive with a refractive index of 1.544 to 1.553, double refraction, and strong aventurescence due to light reflecting off internal micro-inclusions
Hardness & Durability
Origin Region
India, Brazil, Russia, Austria, and Tanzania; typically found in metamorphic quartzites and pegmatites
Hardness & Durability
Mohs hardness of 7, making it durable and suitable for everyday jewelry use such as rings and bracelets, with good toughness and stability against household chemicals
Care & Maintenance
Easy to care for; can be cleaned safely using warm soapy water and a soft brush, avoiding harsh chemical solvents or prolonged exposure to direct sunlight to preserve color vibrancy
Rarity & Value
Common and widely accessible, with value determined by color saturation, even distribution of aventurescence, and lack of dark inclusions; typically very affordable
Special Characteristics
Aventurescence (a glittering metallic sheen caused by light reflection from internal fuchsite or mica plate inclusions)
Lore & History
Often referred to as the stone of opportunity and luck in modern crystal lore, associated traditionally with the heart chakra to promote emotional tranquility, optimism, and leadership qualities