mineral
Chevron Amethyst
Crystalline Silicon Dioxide with Iron impurities (SiO2)
Hardness: 7 on Mohs scale; Color: Purple and white banding; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Purple and white banding
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Purple and white banding; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins and cavities of igneous rocks where silica-rich fluids crystallized. The banding occurs due to alternating layers of amethyst and milky quartz over time as fluid composition changed.
Uses & applications
Widely used for lapidary arts, jewelry, decorative spheres, beaded ornaments, and metaphysical practices.
Geological facts
Chevron Amethyst or 'Dream Amethyst' is known for its distinct V-shaped or 'zigzag' banding patterns. It is one of the most popular varieties of quartz for tumbled stones.
Field identification & locations
Identify by the distinct alternating purple and white v-shaped bands. Commonly found in large deposits in Brazil, Uruguay, and parts of India and Russia.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous