Clear Quartz
Quartz var. Clear Quartz · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal crystal system, forming as tumbled and polished egg-shaped stone with typical hexagonal prismatic habit in its natural state.
Mineral Group
Silicates subgroup Tectosilicates
Chemical Formula
SiO2
Formation Process
Forms primarily through hydrothermal processes, pegmatitic crystallization, and igneous environments from silica-rich solutions at varying temperatures and pressures.
About This Crystal
A polished egg-shaped gemstone made of clear quartz, showing transparent to translucent clarity with internal fractures, wispy veiling inclusions, and a high vitreous polish.
Physical Characteristics
Colorless body color, white streak, conchoidal fracture with no distinct cleavage, specific gravity of approximately 2.65, brittle tenacity, and displays piezoelectric properties.
Optical Properties
Uniaxial positive optical character, refractive index of 1.544 to 1.553, birefringence of 0.009, and singly refractive to doubly refractive with no significant pleochroism.
Hardness & Durability
Origin Region
Worldwide distribution, with major notable sources including Brazil, Madagascar, the United States, and the Himalayan region.
Hardness & Durability
Mohs hardness of 7, good durability and wearability for jewelry use, though internal stress fractures may create points of weakness upon heavy impact.
Care & Maintenance
Safe to clean with warm soapy water and soft brush; avoid harsh chemicals, sudden thermal shock, and prolonged direct sunlight, though color fading is not an issue for clear quartz.
Rarity & Value
Very common mineral globally, with value determined by clarity, size, cut, and polish. Typically very affordable unless featuring rare inclusions.
Special Characteristics
Exhibits internal veiling, subtle rainbow refractions along internal fracture planes, and strong piezoelectric properties under mechanical stress.
Lore & History
Historically revered across ancient civilizations including the Romans, Greeks, and Japanese as frozen water or a powerful spiritual tool. Known in modern crystal healing as the 'master healer' associated with all chakras.