Imperial Topaz

Imperial topaz, also known as precious topaz, is the rarest color of topaz -- a golden-orange to pink hue. Fine specimens come from the Ouro Preto region in Brazil. ... The value of natural imperial topaz can vary greatly depending on the size and quality of the gemstone.

Imperial Topaz, named after the Russian Czars of the 18th and 19th centuries, was widely used in the Imperial Jewels of Russia. With a rank of 8 on the Mohs scale of hardness, the Topaz gem is a durable and hard gemstone that makes the perfect choice for everyday jewelry. this Scale is by: Geology.com you will find multiple images of this Gemstone there, just click the link! {| class="wikitable"
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Physical Properties of Topaz

 * Chemical Classification
 * Silicate.
 * Color
 * Natural colors include: colorless, yellow, orange, brown, red, pink, blue, green. Occurs in a wide range of treated colors, most often blue.
 * Streak
 * Colorless - harder than the streak plate.
 * Luster
 * Vitreous.
 * Diaphaneity
 * Translucent to transparent.
 * Cleavage
 * Perfect basal cleavage.
 * Mohs Hardness
 * 8
 * Specific Gravity
 * 3.4 to 3.6
 * Diagnostic Properties
 * Hardness, prismatic crystals, sometimes striated, cleavage, specific gravity.
 * Chemical Composition
 * Al2SiO4(F,OH)2
 * Crystal System
 * Orthorhombic.
 * Uses
 * Gemstone, Mohs hardness index mineral.
 * }
 * Diagnostic Properties
 * Hardness, prismatic crystals, sometimes striated, cleavage, specific gravity.
 * Chemical Composition
 * Al2SiO4(F,OH)2
 * Crystal System
 * Orthorhombic.
 * Uses
 * Gemstone, Mohs hardness index mineral.
 * }
 * Uses
 * Gemstone, Mohs hardness index mineral.
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