Topaz is popular with people for its crystal texture, lustrous crystals, fresh and bright colors. It is often used to make various ornaments. The stone is the birthstone of November, which symbolizes friendship and love. Where was Paishi born?
Topaz is the product of the gas-forming hydrothermal phase. Therefore, most of the topaz is produced in the granitic pegmatite, gas-forming hydrothermal cloud, skarn, alluvial deposit, acid volcanic rock, high temperature hydrothermal tungsten In the veins such as tin quartz veins.
Topaz is produced in many places in the world, such as Brazil, Sri Lanka, the United States, Myanmar, the Russian Ural Mountains, Australia, China, the United Kingdom, etc. However, the most important topaz origin is in Minas Gerais, Brazil. Here, the granitic pegmatite red produces yellow, deep Sydney yellow, pink, blue and colorless topaz, which accounts for more than 95% of the world's topaz output, the largest piece in the world. 300 kilograms of transparent topaz is produced here and is now housed in the Natural History Museum in New York, USA. Sri Lanka is also an important source of topaz, producing blue, green and colorless topaz. The California state of the United States mainly produces blue and yellow topaz. Topaz is also produced in Xinjiang, Yunnan, Inner Mongolia, Guangdong, and Jiangxi.
Among the various colors of topaz, the deep red is the highest price, followed by pink, blue and yellow, and the colorless value is the lowest. However, a large number of topazes such as blue and pink are currently processed on the market using low-valued topaz such as colorless or brown. For example, many pink and red topaz in Brazil are treated with yellow and orange topaz; the colorless topaz in Xinjiang can be changed to a sky blue topaz. These color-changing topazes should be marked with a color-changing topaz at the time of sale and must be worn for at least half a year to prevent radiation damage to the human body.
The price of topaz is closely related to the color and clarity of topaz. In the color, the red topaz is the most expensive and rare, followed by the Sydney (brown, orange, reddish-brown) topaz, the price of the pink topaz is higher, followed by Blue topaz, yellow topaz is similar in price to citrine, not very high, and the colorless topaz is the least valuable. Different colors of topaz will emit different fluorescence under ultraviolet light. According to the color, they can be generally divided into wine yellow, colorless, blue, green and red topaz. Among them, the finest dark yellow is the most precious, the yellower the better. Followed by blue, green and red.
When buying topaz, pay attention to whether the color is natural, because the low-cost colorless, brown topaz is neutron-radiated, electron accelerator bombardment, Co60 irradiation and heating can be turned into a beautiful sky blue. Pink topaz, and the price of this color-changing topaz is much lower than that of natural blue and pink topaz. In fact, the natural blue and pink topaz is the least common in China. Even though the price has always been high in the world, the most popular ones in the market are blue and pink topaz. It is known that more than 99% of them are made of colorless or brown topaz of original stone. The color of the topaz is not high, the blue is much lower than the aquamarine, but the price of topaz is still generally higher than the crystal.
The artificially modified color of the topaz is not much different from the natural topaz. It is difficult for most people to distinguish. Many unscrupulous merchants use the modified topaz as a natural deceiving consumer, so be careful when purchasing.
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