Topaz, also known as topaz by mineralogists, is a fluorine-containing aluminosilicate [1] mineral with English name Topaz, which is often called topaz in the domestic jewelry industry and is a transliteration of English. It is formed by steam discharged during crystallization of igneous rocks and generally occurs in the pores of rhyolite and granite. This is mainly because both topaz and topaz will be confused with the original names of some gems in China's jewelry industry. In China, yellow hetian jade (nephrite) has long been called topaz, especially in the field of archaeology; Topaz is easily mixed with topaz in crystal. Jade, also known as jadeite, jadeite and Burmese jade, is a kind of jade, and its color is emerald or red. The name of jade comes from the name of a bird. This bird has very bright feathers. Male feathers are red and female feathers are green. They are called kingfishers. In the Ming Dynasty, Burmese jade was introduced into China and named "Jade". Emerald belongs to pyroxene, monoclinic system and perfect cleavage. The main component is sodium aluminum silicate (NaAlSi2O6, only gemstones containing more than 50% sodium aluminum silicate are regarded as jadeite), which is produced in metamorphic rocks generated at low temperature and high pressure. It often coexists with glaucophane, muscovite, andalusite (anorthite dihydrate), aragonite and Yingshi. Mohs hardness is 6.5-7, specific gravity is 3.25-3.35, and melting point is 900- 1000℃