Clear Quartz
Quartz (Silicon Dioxide) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal system, typically forming prismatic crystals
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Forms in igneous, metamorphic, and sedimentary environments, primarily through hydrothermal solutions at various temperatures and pressures
About This Crystal
A small, transparent to translucent colorless crystal exhibiting a vitreous luster and smooth, rounded surfaces typical of a tumbled stone or water-worn pebble
Physical Characteristics
Colorless or white body color with a white streak, conchoidal fracture, no true cleavage, specific gravity of approximately 2.65, and brittle tenacity
Optical Properties
Uniaxial positive with a refractive index of 1.544 to 1.553 and low birefringence
Hardness & Durability
Origin Region
Found worldwide, with notable deposits in Brazil, Madagascar, the USA, and the Alps
Hardness & Durability
Mohs hardness of 7, making it durable and suitable for everyday jewelry use with good resistance to scratching
Care & Maintenance
Easily cleaned with warm soapy water; safe from most household chemicals, though ultrasonic and steam cleaners should be used with caution if inclusions are present
Rarity & Value
Very common and widely available, with low to moderate commercial value depending on clarity, size, and cut
Special Characteristics
Exhibits piezoelectric and pyroelectric properties, converting mechanical stress or temperature changes into electrical voltage
Lore & History
Historically revered by ancient civilizations as a powerful healing stone, often called the 'Master Healer' in modern crystal lore and associated with the crown chakra