Clear Quartz
Quartz (specifically Alpha-Quartz) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, with a massive or irregularly fractured habit in this tumbled/raw specimen state
Mineral Group
Silicates (specifically Tectosilicates)
Chemical Formula
SiO2
Formation Process
Hydrothermal and pegmatitic crystallization from silica-rich fluids at varying temperatures and pressures
About This Crystal
A transparent to translucent, colorless raw or partially shaped crystal chunk displaying a vitreous luster, conchoidal fracture surfaces, and internal fractures reflecting light
Physical Characteristics
Colorless body color, white streak, no cleavage, conchoidal fracture, specific gravity around 2.65, brittle tenacity, piezoelectric and pyroelectric properties, generally inert under UV light
Optical Properties
Singly refractive optic axis with uniaxial positive character, refractive index of 1.544 to 1.553, low birefringence of 0.009
Hardness & Durability
Origin Region
Found worldwide, with major deposits in Brazil, Madagascar, the USA, and the Alps; forms in various geological environments
Hardness & Durability
Mohs hardness of 7, making it durable and scratch-resistant, with good wearability for jewelry despite lacking cleavage and being somewhat brittle
Care & Maintenance
Can be safely cleaned with warm soapy water; avoid harsh chemical acids (except hydrofluoric) and protect from extreme thermal shock
Rarity & Value
Common, highly accessible, affordable for raw specimens, though high-clarity optical grade or specific inclusions increase value
Special Characteristics
Displays piezoelectricity, generating an electrical charge under mechanical stress, and often contains natural fluid inclusions or phantom growth lines
Lore & History
Known historically as the 'Master Healer', used across ancient civilizations for tools, ornaments, and scrying; associated traditionally with all chakras and amplifying energy