Topaz
Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem. Colourless 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.
Birthstones & Anniversaries
Precious topaz is a birthstone for November, and blue topaz is a birthstone for December. Blue topaz is the gem of the 4th anniversary and Imperial topaz is the gem of the 23rd anniversary.
Facts
Mineral: Topaz
Chemistry: Al2(F,OH)2SiO4
Colour: Yellow, orange, brown, pink to red to purple red, blue, light green and colourless
Refractive index: 1.619 to 1.627
Birefringence: 0.008 to 0.010
