Pokhraj Gemstone essay
Pokhraj Gemstone Pokhraj Gemstone is known as Topaz in English. Pokhraj is a much-valued gemstone, the chemical formula being Al2SiO4(F,OH)2. The esteemed gemstone variety is a wine-yellow Pokhraj, but the blue, pale green and pink varieties are also gemstone. A rose-pink variety is yellow stone changed by heating. These varieties exhibit dichroism. Pokhraj is…
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