Topaz is a birthstone for August and November, and blue topaz is a birthstone for November. It is associated with the astrology sign Sagittarius. Topaz is a modern gift for the 15th, 16th and 23rd wedding anniversary. Blue topaz is a modern gift for the 4th wedding anniversary, golden topaz for the 19th.
Most topaz is a golden yellow color, but it also occurs in pink and red (these are rare), blue, green, and colorless. London blue topaz usually starts out colorless, and then gets irradiated and heat treated to achieve a richer, deeper blue color.
Keep at room temperature, in a dark place – sunlight and heat can fade and damage topaz. NEVER clean topaz jewelry with a steam cleaner or with an ultrasonic cleaner, and always remove it before bathing or showering. It is also best to take it off while applying body lotions, sunscreens, etc. and while working with household chemicals. Avoid harsh detergents.
To clean, use a tiny bit of bleach-free liquid dish soap on a soft sponge in lukewarm water, or use a water and baking soda solution (1/4 teaspoon baking soda in 1/2 cup of water should do the trick) on a soft sponge. If necessary, brush gently with an old, SOFT toothbrush. Rinse with water until all traces of soap or baking soda are gone. Air dry, or carefully dry with a soft cloth.