Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.
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.
Color: Yellow, orange, brown, pink to red to purple red, blue, light green and colorless
Refractive index: 1.619 to 1.627
Birefringence: 0.008 to 0.010
Specific gravity: 3.53
Mohs Hardness: 8
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