Amethyst
Quartz var. Amethyst · Semi-Precious Gemstone
Crystal System
Trigonal, carved into a mushroom habit
Mineral Group
Silicates - Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal veins and volcanic gas cavities at low to moderate temperatures
About This Crystal
A small, polished gemstone carved into the shape of a mushroom, displaying deep purple and violet hues with translucent to transparent areas and natural internal zoning.
Physical Characteristics
Purple body color, white streak, conchoidal fracture, no true cleavage, specific gravity of approximately 2.65, brittle tenacity
Optical Properties
Uniaxial positive optical character, refractive index of 1.544-1.553, weak birefringence, faint pleochroism in purplish-red and reddish-purple
Hardness & Durability
Origin Region
Brazil, Uruguay, Madagascar, Zambia
Hardness & Durability
Mohs hardness of 7, fair toughness due to lack of cleavage, sensitive to prolonged direct sunlight which can cause fading
Care & Maintenance
Clean with warm soapy water using a soft brush, avoid ultrasonic cleaners and harsh chemicals, store away from direct sunlight
Rarity & Value
Common, widely available, value determined by color saturation, transparency, and size
Special Characteristics
Natural color zoning and phantom formations are common in untreated specimens
Lore & History
Historically used as a talisman against drunkenness and to keep the wearer clear-headed; associated with the Third Eye and Crown chakras in modern crystal healing