Clear Quartz
Quartz var. Rock Crystal · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal, typically forming prismatic crystals terminated by six-sided pyramids
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Hydrothermal veins, pegmatites, and igneous or metamorphic environments from silica-rich solutions
About This Crystal
A tumbled, semi-translucent to transparent pebble with a smooth, polished surface, exhibiting a pale yellowish-white or clear coloration and vitreous luster typical of quartz.
Physical Characteristics
Colorless to white with a white streak, conchoidal fracture, no distinct cleavage, specific gravity of 2.65, brittle tenacity, and exhibits piezoelectricity.
Optical Properties
Singly or weakly doubly refractive with a refractive index of approximately 1.544-1.553, uniaxial positive optical character.
Hardness & Durability
Origin Region
Worldwide, with significant deposits in Brazil, Madagascar, the USA, and the Alps
Hardness & Durability
Mohs hardness of 7, good durability, resistant to scratching by most common materials except harder minerals like topaz or corundum.
Care & Maintenance
Safe to clean with warm soapy water; avoid harsh chemicals and prolonged exposure to direct sunlight if treated, though natural clear quartz is generally stable.
Rarity & Value
Common, widely available, inexpensive unless featuring rare inclusions, specific geographic provenance, or large flawless crystal size.
Special Characteristics
Exhibits piezoelectric and pyroelectric properties; often used in electronics, oscillators, and traditional energetic cleansing practices.
Lore & History
Historically revered across ancient civilizations including the Romans, Greeks, and Japanese who called it 'tama' (perfect jewel). Widely used in modern metaphysical practices as a master healer stone associated with all chakras.