Yellow gem is very popular in crystal jewelry.Most girls all likefashion crystal jewelry .The occidental topaz is called in the gem “the crystal yellow gem”, its color from light yellow, the process yellow, orange yellow, to golden yellow has. Because brightness and the chroma are very splendid, so long as is transparent and is bright and clean, calls the high-grade goods, moreover is also far the topaz is brighter than, therefore is subject to the consumer to favor, often is cut Cheng Zhui to play the part or to abstain the surface. Because the natural occidental topaz is extremely scarce, the price is also quite expensive, therefore the field many makes the occidental topaz by the amethyst heating processing way. This kind of physical appearance's occidental topaz, quantity are many, the price is also quite cheap, moreover its color under the normal room temperature, is forever invariable, therefore is accepted generally by the social populace.