Chevron Amethyst
Quartz var. Amethyst (with Quartz var. Milky Quartz) · Semi-Precious Gemstone
Crystal System
Trigonal; typically found in massive form with V-shaped (chevron) banding or as geode linings.
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Silicon Dioxide) with traces of Iron (Fe3+)
Formation Process
Hydrothermal; forms from silica-rich solutions in cavities or veins where alternating periods of Amethyst and Milky Quartz growth create a banded pattern.
About This Crystal
A polished, tumbled stone featuring alternating bands of deep purple amethyst and white/grey-translucent milky quartz. It displays a vitreous (glassy) luster and is translucent to opaque due to the dense banding.
Physical Characteristics
Color: Purple and white banding; Streak: White; Fracture: Conchoidal; Specific Gravity: 2.65; Fluorescence: Generally inert to weak bluish-white under SWUV.
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: 0.009; Doubly refractive; No significant pleochroism in tumbled form; no dispersion visible.
Hardness & Durability
Origin Region
Brazil, Uruguay, and Africa (specifically South Africa and Zambia); found in volcanic and metamorphic environments.
Hardness & Durability
Mohs Hardness: 7; Good toughness; excellent wearability for all types of jewelry. Durable and resistant to common scratches.
Care & Maintenance
Wash with warm soapy water; avoid prolonged exposure to direct sunlight as purple color may fade; safe for most cleaners but ultrasonic should be used with caution if fractures are visible.
Rarity & Value
Common; very affordable. Value is determined by the contrast of the banding and the richness of the purple color segments.
Special Characteristics
Distinctive V-shaped chevron patterns; phantom-like growth layers; combination of color-zoned amethyst and milky quartz.
Lore & History
Historically used as a stone for protection and sobriety. In metaphysical practices, it is associated with the Third Eye Crown chakras, believed to combine the stress-relieving qualities of amethyst with the purifying qualities of quartz.