Aventurine (Green)
Quartzite (rock) containing Fuchsite mica · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal (Quartz host); Hexagonal Scalenohedral. Habit is typically massive or granular in appearance.
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Quartz) with K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite inclusions)
Formation Process
Metamorphic. Forms through the recrystallization of quartz-rich sediments under high pressure and temperature, where Fuchsite mica flakes align to create its signature look.
About This Crystal
A translucent to opaque green stone with a signature 'aventurescence'—a shimmering effect caused by light reflecting off tiny platy inclusions of Fuchsite mica. The color is a medium forest green with a sugary, granular texture and a vitreous to dull luster.
Physical Characteristics
Color: Green; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.64–2.69; Fluorescence: Generally inert to weak reddish under UV.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: 0.009; Optical Phenomenon: Aventurescence (platelet-like reflections from mica inclusions).
Hardness & Durability
Origin Region
India (major producer), Brazil, Russia, and Tanzania. Found in metamorphic rocks like schists and quartzites.
Hardness & Durability
Mohs Hardness: 6.5–7. Toughness is good due to its interlocking crystalline structure. Generally durable for most jewelry types.
Care & Maintenance
Safe to clean with warm soapy water and a soft brush. Avoid harsh chemicals and ultrasonic cleaners if the stone is heavily included or dyed. Store away from harder gems like Topaz or Diamonds to prevent scratching.
Rarity & Value
Common. Value is determined by the intensity of color and the quality of the aventurescence. Very affordable; often used for beads, carvings, and tumbled stones.
Special Characteristics
Aventurescence: An optical shimmering effect produced by the reflection of light from tiny platy mineral inclusions (Fuchsite) within the quartz.
Lore & History
Historically known as the 'Stone of Opportunity' and believed to be the luckiest of all crystals. It has been used in talismans and decorative carvings for centuries across various cultures. In modern crystal healing, it is associated with the Heart Chakra and thought to promote prosperity and emotional calm.