The most expensive gemstones in the world The most expensive gemstones in the world. When we talk about this, then the answer of most people is diamond. But most people do not know that apart from diamonds, there are many such gems in the world, which are not only valuable but their price is also more than diamonds. After knowing their value, you will press your finger under your teeth. Here we will know about the most expensive gemstones in the world, along with their chemical names. Jeremejevite You have hardly heard the name of this gem. The chemical formula of this mineral is Al6B5O15(F, OH)3 . It is a member of the aluminum family, which also contains fluoride and hydroxide. It was first discovered in 1883 in Adun-Chilon, a mountain in Siberia. This stone is as hard as quartz. If its hardness is measured on the Mohs scale, it falls between 6.5 to 7.5 , so it is used in making jewelry. Depending on the purity in the market, its price can be up to 2 thousand dollars per carat .
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