Clear Quartz
Quartz var. Rock Crystal · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal crystal system, forming prismatic hexagonal crystals terminated by rhombohedrons.
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Hydrothermal and pegmatitic formation, crystallizing from silica-rich solutions at varying temperatures and pressures.
About This Crystal
A transparent to translucent, colorless single crystal specimen with a vitreous luster, showing standard prismatic habit and terminal faces.
Physical Characteristics
Colorless body color, white streak, conchoidal fracture, no true cleavage, specific gravity of approximately 2.65, brittle tenacity.
Optical Properties
Uniaxial positive, refractive index of 1.544-1.553, birefringence of 0.009, doubly refractive.
Hardness & Durability
Origin Region
Worldwide, with significant deposits in Brazil, Madagascar, Arkansas (USA), and the Alps.
Hardness & Durability
Mohs hardness of 7, good durability, resistant to scratching by most common materials, suitable for general jewelry use.
Care & Maintenance
Can be safely cleaned with warm soapy water and a soft brush. Avoid harsh chemical cleaners and sudden extreme temperature changes.
Rarity & Value
Very common mineral globally, highly accessible and affordable, though flawless large specimen crystals command higher collector prices.
Special Characteristics
Exhibits piezoelectric and pyroelectric properties, can contain various mineral inclusions or fluid-filled cavities.
Lore & History
Historically regarded by ancient civilizations as frozen water or divine light. Used widely in modern crystal healing as a master healer stone associated with all chakras.