Swiss Blue Topaz is a variation of the topaz mineral and is one of the most prominent blue gemstone in the world. It is famous for its deep, vibrant blue color, which is generated by treating a natural topaz stone. The stone is then heated to maintain the color and make it permanent. Swiss Blue Topaz is a durable gemstone, and it has a hardness of 8 on the Mohs scale, which makes it...
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