Clear Quartz
Quartz var. Rock Crystal · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal, typically forming hexagonal prisms terminating in pyramids
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal veins, pegmatites, and igneous cavities, forming from silica-rich aqueous solutions at varying temperatures and pressures
About This Crystal
Small, transparent, colorless tumbled or raw pebble-like specimen displaying a vitreous luster, smooth worn or natural faces, and internal clarity with minor minor internal fractures or inclusions
Physical Characteristics
Colorless body color, white streak, no cleavage, conchoidal fracture, specific gravity of approximately 2.65, brittle tenacity, and piezoelectric properties
Optical Properties
Singly or weakly doubly refractive with a refractive index of 1.544 to 1.553, low birefringence, uniaxial positive optical character, and no notable pleochroism due to lack of color
Hardness & Durability
Origin Region
Worldwide distribution, with major notable sources in Brazil, Madagascar, Arkansas (USA), and the Alps
Hardness & Durability
Mohs hardness of 7, excellent durability with no cleavage making it highly suitable for everyday jewelry wear, resistant to scratching by most common materials
Care & Maintenance
Extremely durable; can be cleaned safely with warm soapy water, ultrasonic cleaners, and steam, though harsh hydrofluoric acid should be avoided
Rarity & Value
Common, widely accessible, with value primarily determined by size, clarity, and perfection of natural crystal form rather than material rarity
Special Characteristics
Displays piezoelectricity (generates electrical charge under mechanical stress) and pyroelectricity, along with possible minor inclusions or rainbow fractures
Lore & History
Historically known as 'krystallos' by the ancient Greeks, believed to be frozen ice sent by the gods. Revered across ancient cultures for scrying and spiritual clarity. In modern crystal healing, it is known as the 'Master Healer' and is traditionally associated with the crown chakra and amplification of energy