Chevron Amethyst
Quartz var. Amethyst · Semi-Precious Gemstone
Crystal System
Trigonal, typically forming as prismatic crystals ending in a six-sided pyramid, or in this specimen, as tumbled massive material featuring characteristic V-shaped or chevron-like growth zoning.
Mineral Group
Silicates (Subgroup: Tectosilicates)
Chemical Formula
SiO2
Formation Process
Hydrothermal and magmatic processes, where silicon dioxide-rich solutions precipitate within cavities of volcanic rocks at moderate temperatures, incorporating trace iron and experiencing rhythmic growth fluctuations to form bands.
About This Crystal
A polished, tumbled stone displaying distinct V-shaped bands of deep purple and milky white quartz in a chevron pattern. It has a smooth surface texture, semi-translucent to opaque clarity, and a vitreous to waxy luster typical of tumbled quartz.
Physical Characteristics
Deep purple and white color zoning, white streak, conchoidal fracture, no true cleavage, specific gravity of approximately 2.65, brittle tenacity, and occasionally exhibits weak fluorescence under shortwave UV light.
Optical Properties
Uniaxial positive, doubly refractive with a refractive index of 1.544 to 1.553, and a low birefringence of 0.009. Pleochroism is weak, showing faint alternate shades of purple.
Hardness & Durability
Origin Region
Notable sources include Brazil, Madagascar, India, and South Africa. Typically forms in hydrothermal veins, volcanic cavities, and pegmatites.
Hardness & Durability
Mohs hardness of 7, making it durable and well-suited for everyday jewelry use such as rings and pendants. Good toughness with no cleavage planes to worry about.
Care & Maintenance
Safe to clean with warm soapy water. Avoid prolonged exposure to direct sunlight to prevent color fading. Can be scratched by harder stones like topaz or corundum, so store separately.
Rarity & Value
Common, widely available and affordable. Value is determined by the distinctness of the chevron pattern, color saturation, and size of the stone.
Special Characteristics
Distinct V-shaped chevron or banded growth patterns combining purple amethyst and white milky quartz, often accompanied by microscopic fluid inclusions.
Lore & History
Historically associated with peace, clarity, and spiritual growth. In modern crystal healing, it is often linked to the third eye and crown chakras, believed to enhance intuition and release stress, though these are traditional beliefs and not scientific claims.