Clear Quartz
Quartz var. Clear Quartz · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, with a massive or crystalline habit
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Hydrothermal and igneous processes, frequently crystallizing from silica-rich fluids in pegmatites and veins
About This Crystal
A translucent to transparent raw quartz specimen exhibiting a vitreous luster, irregular shape, and internal fracturing with surface weathering.
Physical Characteristics
Colorless to white with a white streak, conchoidal fracture, lack of distinct cleavage, specific gravity of approximately 2.65, and brittle tenacity
Optical Properties
Uniaxial positive optical sign with a refractive index of 1.544 to 1.553, showing double refraction and no significant pleochroism
Hardness & Durability
Origin Region
Worldwide, with significant deposits in Brazil, Madagascar, the United States, and the Alps
Hardness & Durability
Mohs hardness of 7, good durability, resistant to scratching by most common materials, but brittle under severe impact
Care & Maintenance
Can be cleaned safely with warm soapy water; avoid harsh chemicals and extreme thermal shock
Rarity & Value
Very common worldwide, with low to moderate value depending on clarity, size, and aesthetic formation
Special Characteristics
Exhibits piezoelectric and pyroelectric properties, often containing fluid inclusions or internal fractures creating light refractions
Lore & History
Historically revered across many ancient cultures as a powerful healing stone, traditionally associated with clarity, amplification, and the Crown Chakra