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Unique in its kind, the rarest gemstone in the world is called kyawthuite. The unique specimen is currently housed in the Natural History Museum of Los Angeles County. Where it came from and its ...
The value of kyawthuite is currently listed as priceless. The world's second-rarest gem, a mineral called painite, is valued at US$50,000 to $60,000 a carat. Oof. The world's only known piece of ...