Blue Topaz
Blue topaz, as it occurs in nature, is quite pale in color and very rare. The incredible range of blues seen in the market today have all been produced by irradiation and heating of colorless topaz. This process is stable and the color is permanent. The three most poplular shades are known as:
Sky – light blue reminiscent of aquamarine
Swiss – vivid medium blue
London – deep intense blue
Blue topaz is one of the birthstones for December and is designated for the 4th wedding anniversary.
Refractive Index
1.619-1.627 (+/- 0.01)
Specific Gravity
3.53 (+/- 0.04)
Hardness
8
Toughness
Poor
Enhancements
Blue Topaz is irradiated and heated to produce color
Enhancements Frequency
Always
Enhancements Stability
Excellent
Care Tips
Although hard, Topaz is relatively fragile. Be sure to handle with care. Ultrasonic and steam cleaning should be avoided.
Birthstone Month
November
Anniversary Year
4th
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