gemstone
Yellow Topaz
Al2SiO4(F,OH)2
AI-generated identification · may be incorrectHardness of 8 on the Mohs scale, yellow to golden color, vitreous luster, and an orthorhombic crystal system.
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Physical properties
Hardness of 8 on the Mohs scale, yellow to golden color, vitreous luster, and an orthorhombic crystal system.
Formation & geological history
Forms in pegmatites and high-temperature quartz veins, often crystallizing during the late stages of igneous cooling.
Uses & applications
Used extensively as a gemstone in fine jewelry and as an ornamental mineral for collectors.
Geological facts
Topaz is one of the hardest naturally occurring minerals and serves as the index mineral for a hardness of 8 on the Mohs scale.
Field identification & locations
Identified by its distinct conchoidal fracture, high density, and refusal to be scratched by quartz.
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