Quartz
Silicon Dioxide var. Clear Quartz and Citrine · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, typically forming small tumbled or naturally rounded pebble-like grains or fragments
Mineral Group
Silicates
Chemical Formula
SiO2
Formation Process
Hydrothermal veins, pegmatites, and sedimentary environments at moderate temperatures and pressures
About This Crystal
A collection of small, tumbled, translucent to transparent, glassy, pebble-sized mineral grains showing colorless/clear and pale yellow-orange coloration
Physical Characteristics
Color ranges from colorless to pale yellowish-orange; white streak; conchoidal fracture; no true cleavage; specific gravity around 2.65
Optical Properties
Singly refractive or optically uniaxial positive with low birefringence; vitreous luster
Hardness & Durability
Origin Region
Worldwide, commonly found in Brazil, Madagascar, and the United States
Hardness & Durability
Mohs hardness of 7; brittle tenacity; good durability for jewelry wear
Care & Maintenance
Clean with warm soapy water; safe from most chemicals; avoid extreme thermal shock; can be exposed to sunlight safely
Rarity & Value
Very common mineral; low to moderate value depending on size, clarity, and specific variety
Special Characteristics
Piezoelectric and pyroelectric properties; some grains show natural yellow coloration from trace iron impurities
Lore & History
Widely used in historical amulets, crystal healing for clarity, energy amplification, and balancing all chakras