The English name TOPAZ comes from the Sanskrit TOPUS, which means "fire". China's jewelry industry is called topaz, while Huang Yushi is a transliteration of Hongkong, while the ancients called it topaz and yellow.

"Polygonatum sibiricum" and topaz may be related to topaz, a fine topaz among topaz. In the past, topaz was also a kind of precious gem, and its precious value was only slightly lower than that of ruby and sapphire. The most precious variety was yellow-brown-yellow, which was similar to the color of a rare snow plow wine in Spain and was called the gem of snow plow topaz commercially. Later, a large number of yellow crystals entered the market as Sydney topaz, which made the value of topaz plummet.

Topaz, as the birthstone of June 5438+0 1, is the best gift to express friendship. People wearing topaz can be used as amulets to eliminate sadness, ward off evil spirits and enhance courage and wisdom; In the west, some people even think that topaz has the efficacy of treating asthma, burns and bleeding, and regard it as a symbol of wealth and piety.

Topaz is produced all over the world. The most important gem-grade topaz is produced in minas gerais, Brazil, where topaz is yellow, deep Sydney yellow, pink, blue and colorless. Sri Lanka is also an important producing area, and its topaz is mainly blue, green and colorless. California produces blue and yellow topaz.

A large number of colorless topaz produced in Guangdong, Xinjiang, Yunnan and other places in China can be turned into beautiful sky blue by neutron radiation, electron accelerator bombardment, Co60 irradiation and heating. It is worth noting that topaz discolored by neutron radiation is radioactive and needs to be left for a certain period of time (such as more than half a year) before it can be used as a decorative gem, otherwise it will cause certain harm to human body.

Once upon a time, many people were frightened by the radioactivity of topaz. In fact, it took more than half a year from changing the color of raw materials or blanks to processing them into rings and then inlaying them into jewelry. Topaz changed with Co60 is not very radioactive, so it is not necessary to be too sensitive to the radioactivity of the changed topaz.

Tips for buying topaz jewelry

(1) First of all, pay attention to the color when buying topaz. Bright and pure wine yellow and orange topaz are good products.

(2) Gemstone processing should be standardized and bright, and there should be no cracks, defects and edge collapse.

(3) Ask whether the color is natural or radiant.