Imperial Topaz
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Mineral NameImperial Topaz
Chemical FormulaAl2SiO4(F,OH)2
Mohs Hardness8
Crystal Systemorthorhombic
Lustervitreous
Streak Colorwhite
Cleavageperfect basal
Fractureconchoidal
Specific Gravity3.5
Colorsgolden orange, pinkish orange, sherry red
Transparencytransparent
Type LocalityOuro Preto, Minas Gerais, Brazil
Mineral GroupSilicates
Usesjewelry, collector
Associated Mineralsquartz, feldspar, mica
Rarityuncommon
Description
A faceted, reddish-orange to pinkish-orange transparent gemstone with excellent clarity, characteristic of Imperial Topaz.
Geological Context
Imperial Topaz forms in granitic pegmatites and high-temperature hydrothermal veins, often associated with igneous rocks like rhyolites.
