gemstone
Imperial Topaz
Al2SiO4(F,OH)2
AI-generated identification · may be incorrectHardness of 8 on the Mohs scale, vibrant golden-orange to pink color, vitreous luster, and orthorhombic crystal system with perfect basal cleavage.
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Physical properties
Hardness of 8 on the Mohs scale, vibrant golden-orange to pink color, vitreous luster, and orthorhombic crystal system with perfect basal cleavage.
Formation & geological history
Forms in high-temperature hydrothermal veins and cavities within felsic igneous rocks like rhyolite and granite.
Uses & applications
Prized globally as a high-end gemstone for fine jewelry and highly sought after by mineral collectors.
Geological facts
Imperial topaz is the rarest and most valuable variety of natural topaz, historically associated with Russian royalty.
Field identification & locations
Easily identified by its extreme hardness, high specific gravity, and distinct warm yellow-orange hues, primarily sourced from Ouro Preto, Brazil.
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