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Buying TOPAZTopaz comes in many colors such as blue, yellow, pink, brown, green and clear. Most of these varieties are not very expensive, even in good quality. Orange-red "Imperial" topaz is rare, and much more expensive. Clear topaz is commonly irradiated and heat treated to become other colors such as blue. This process is considered very stable. Yellow and brown topaz is often heat treated to become pink topaz. Natural pink topaz is very rare. Dealers will frequently use terms such as "Bohemian Topaz", "Madeira Topaz" and "Occidental topaz." These are really just fancy names for yellow quartz, also known as citrine. "Nevada topaz" refers to smoky obsidian, and "Spanish topaz" is really just orange-brown quartz. Don’t be fooled—make sure that the topaz you buy is really topaz! Topaz is a very hard gemstone, 8 on the Mohs scale, but it can be split with a single blow, a trait it shares with diamond. As a result it should be protected from hard knocks. Also avoid large temperature changes (such as leaving it be a heater vent or in a hot car). Do not clean topaz in a home ultrasonic cleaner. The best way to clean topaz is with warm soapy water.
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