Chevron Amethyst
Quartz var. Amethyst · Semi-Precious Gemstone
Crystal System
Trigonal, presenting as a tumbled and polished smooth stone mass with characteristic chevron banding patterns
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 with trace iron and aluminum impurities
Formation Process
Hydrothermal and magmatic processes, where silica-rich fluids deposit quartz in cavities within volcanic rocks at low to moderate temperatures, combining with trace iron subjected to natural irradiation
About This Crystal
A tumbled, polished specimen featuring distinct V-shaped or chevron-like alternating bands of deep violet-purple and milky white quartz, showing translucent to opaque clarity with a vitreous to waxy luster
Physical Characteristics
Purple and white body color, white streak, no cleavage, conchoidal fracture, specific gravity around 2.65, brittle tenacity, and occasionally weak yellowish fluorescence under longwave UV light
Optical Properties
Uniaxial positive optical sign with a refractive index of 1.544-1.553, low birefringence of 0.009, and faint dichroism in shades of purple
Hardness & Durability
Origin Region
Brazil, Madagascar, South Africa, and Uruguay; formed in hydrothermal veins and volcanic cavities
Hardness & Durability
Mohs hardness of 7, fair to good toughness, stable under normal conditions but sensitive to extreme heat and prolonged direct sunlight
Care & Maintenance
Clean with warm soapy water using a soft cloth, avoid ultrasonic cleaners and harsh chemicals, and store away from direct sunlight to prevent color fading
Rarity & Value
Common, widely accessible and affordable, with value determined by the intensity and distinctness of the chevron banding patterns
Special Characteristics
Features prominent chevron zigzag zoning patterns resulting from alternating growth phases of amethyst and white quartz
Lore & History
Historically associated with peace, spiritual protection, and clarity; commonly linked to the third eye and crown chakras in modern crystal healing traditions