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 ...
For example, jadeite is the hardest natural mineral, and painite is the second-rarest mineral in the world. The rarest mineral in the world is kyawthuite (Photo: mindat) Cost of kyawthuite The ...