gemstone
Blue Topaz
Al2SiO4(F,OH)2
AI-generated identification · may be incorrectHardness of 8 on the Mohs scale, vitreous luster, orthorhombic crystal system, and distinct basal cleavage.
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Physical properties
Hardness of 8 on the Mohs scale, vitreous luster, orthorhombic crystal system, and distinct basal cleavage.
Formation & geological history
Forms in pegmatites and high-temperature hydrothermal veins, often treated via irradiation and heating to achieve vibrant blue colors.
Uses & applications
Widely used in fine jewelry, rings, and pendants as an affordable alternative to sapphire.
Geological facts
Natural blue topaz is extremely rare, so most commercial specimens are colorless stones enhanced through artificial irradiation.
Field identification & locations
Identified by its high density, conchoidal fracture, and characteristic hardness that scratches quartz.
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