Chevron Amethyst
Quartz var. Amethyst (IMA-approved: Quartz) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal system; tumbled, smooth, and rounded pebble habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with trace iron (Fe3+) impurities and microscopic fluid inclusions
Formation Process
Hydrothermal and magmatic processes, precipitating from silica-rich aqueous solutions within cavities of volcanic rocks at low to moderate temperatures
About This Crystal
A polished tumbled stone exhibiting distinctive V-shaped chevron or band patterns alternating between deep violet-purple quartz and milky-white quartz, with a smooth, glossy, vitreous luster and translucent to opaque areas
Physical Characteristics
Purple and white body color, white streak, no cleavage, conchoidal fracture, specific gravity of approximately 2.65, brittle tenacity, and piezoelectric properties
Optical Properties
Uniaxial positive with a refractive index of 1.544 to 1.553, weak birefringence of 0.009, and weak dichroism in shades of purplish-red and reddish-purple
Hardness & Durability
Origin Region
Globally distributed; notable sources include Brazil, Madagascar, South Africa, and India; forms in volcanic cavities and hydrothermal veins
Hardness & Durability
Mohs hardness of 7, fair toughness due to lack of cleavage, stable under normal conditions, and highly durable for daily jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid ultrasonic cleaners and steam if fractures are present; store away from prolonged direct sunlight to prevent color fading
Rarity & Value
Common; widely accessible and affordable, with value determined by the crispness of the chevron pattern and color saturation
Special Characteristics
Distinctive natural chevron zonation combining amethyst and white quartz growth phases
Lore & History
Historically valued as a stone of peace, sobriety, and spiritual protection; traditionally associated with the third eye and crown chakras in modern metaphysical practices