Clear Quartz Double-Terminated Crystal
Quartz (Silicon Dioxide) · Mineral Specimen and Semi-Precious Gemstone.
Crystal System
Trigonal crystal system, hexagonal prism habit terminated by rhombohedra at both ends (double-terminated).
Mineral Group
Silicate mineral group, specifically tectosilicates.
Chemical Formula
SiO2
Formation Process
Forms hydrothermally from silica-rich aqueous solutions at moderate temperatures and pressures within cavities or fissures.
About This Crystal
A colorless, transparent to translucent double-terminated quartz crystal showing hexagonal prismatic faces capped with terminating pyramids at both extremities.
Physical Characteristics
Colorless body color with a white streak. Conchoidal fracture, no true cleavage, specific gravity of approximately 2.65, and vitreous luster.
Optical Properties
Singly or doubly refractive depending on propagation direction, uniaxial positive, refractive index ranging from 1.544 to 1.553, with no significant pleochroism.
Hardness & Durability
Origin Region
Found globally; notable sources include Brazil, Madagascar, the United States (Arkansas), and the Alps.
Hardness & Durability
Mohs hardness of 7, making it durable for jewelry use, with good resistance to scratching but brittle tenacity.
Care & Maintenance
Easy to clean with warm soapy water and a soft brush; safe from most household chemicals, stable in light and heat.
Rarity & Value
Very common globally, though high clarity or unusual double-terminated specimens command moderate collector value.
Special Characteristics
Exhibits piezoelectric and pyroelectric properties; double termination suggests unhindered growth floating in a fluid medium.
Lore & History
Widely regarded in crystal healing as the 'master healer' crystal, amplifying energy and intention across all chakras, with a long history in ancient amulets.