Tigers Eye
Quartz var. Tiger's Eye · Semi-Precious Gemstone
Crystal System
Trigonal, massive or fibrous habit
Mineral Group
Silicates
Chemical Formula
SiO2
Formation Process
Pseudomorphic replacement of crocidolite fibers by silica
About This Crystal
A polished, tumbled stone displaying golden-brown to reddish-brown stripes with a silky, chatoyant sheen. It is opaque with a fibrous internal structure.
Physical Characteristics
Golden brown, yellow-brown, red-brown; white streak; no cleavage; conchoidal fracture; specific gravity 2.64-2.71; brittle tenacity
Optical Properties
Refractive index 1.544-1.553, doubly refractive, strong chatoyancy (cat's eye effect)
Hardness & Durability
Origin Region
South Africa, Western Australia, USA, Canada, India
Hardness & Durability
Mohs hardness 7, good toughness, durable and suitable for general jewelry
Care & Maintenance
Clean with warm soapy water, avoid harsh chemicals and prolonged direct sunlight to prevent fading
Rarity & Value
Common and affordable, widely available globally
Special Characteristics
Chatoyancy resulting from parallel intergrown quartz fibers and altered amphibole fibers
Lore & History
Historically used as an amulet against curses and ill-wishing. Associated with courage, willpower, and the solar plexus chakra in crystal healing lore.