gemstone
Blue Topaz
Aluminum silicate fluoride hydroxide, Al2SiO4(F,OH)2
AI-generated identification · may be incorrectMohs hardness of 8, vitreous luster, orthorhombic crystal system, perfect basal cleavage, and specific gravity of 3.4-3.6.
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Physical properties
Mohs hardness of 8, vitreous luster, orthorhombic crystal system, perfect basal cleavage, and specific gravity of 3.4-3.6.
Formation & geological history
Forms in pegmatites, high-temperature quartz veins, and cavities in rhyolite and granite rocks via hydrothermal processes.
Uses & applications
Widely utilized in fine jewelry, metaphysical crystal healing, and as a collector's mineral specimen.
Geological facts
Most vibrant blue topaz on the market is produced by treating colorless topaz with irradiation and heat.
Field identification & locations
Identified by high hardness, vitreous luster, and distinct crystal habit; found globally including Brazil, Sri Lanka, and the US.
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