Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.
Colorless topaz treated to blue is a mass-market gem. Fine pink-to-red, purple, or orange gems are one-of-a-kind pieces. Top sources include Ouro Prêto, Brazil, and Russia's Ural Mountains.
Irradiating colorless topaz with electrons at energy of 10 million electron volts creates a sky blue color.
The royal court in Portugal celebrates the discovery of Imperial topaz in 1768.
A transparent topaz crystal discovered in Minas Gerais, Brazil weighs an astounding 596 pounds.
The most valued topaz colors are orangy red to red. Blue gems are widely available.
Topaz used in jewelry is typically eye clean with no visible inclusions.
Topaz crystals are usually columnar, and cut as oval or pear shapes to improve yield.
Topaz can often form as large crystals. These can yield sizeable cut gems.
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