Clear Quartz
Quartz var. Rock Crystal · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, typically forming prismatic crystals terminated by six-sided pyramids.
Mineral Group
Silicates (Subgroup: Tectosilicates)
Chemical Formula
SiO2
Formation Process
Hydrothermal and igneous processes, crystallizing from silica-rich solutions and cooling magma over a wide range of temperatures and pressures.
About This Crystal
A tumbled, transparent to translucent specimen showing colorless to subtle smoky zones with a vitreous luster, smooth polished surface, and internal fracture lines.
Physical Characteristics
Colorless body color, white streak, no true cleavage, conchoidal fracture, specific gravity of approximately 2.65, brittle tenacity, and piezoelectric properties.
Optical Properties
Uniaxial positive, refractive index of 1.544 to 1.553, birefringence of 0.009, doubly refractive.
Hardness & Durability
Origin Region
Global distribution; notable sources include Brazil, Madagascar, the United States (Arkansas), and the Alps.
Hardness & Durability
Mohs hardness of 7, good durability and toughness, making it highly suitable for everyday jewelry wear.
Care & Maintenance
Safe to clean with warm soapy water; avoid harsh chemicals and extreme thermal shock. Store separately to prevent scratching softer stones.
Rarity & Value
Very common; affordable and widely accessible, with value depending on clarity, size, and cutting quality.
Special Characteristics
Exhibits piezoelectricity, generating an electric charge under mechanical stress.
Lore & History
Historically used in ancient civilizations for tools, carvings, and scrying oracles. In modern crystal healing, it is regarded as the "Master Healer" stone associated with all chakras, symbolizing clarity and energy amplification.