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35 Most Valuable Gemstones, From Least to Most Expensive
The extremely rare mineral is borosilicate ... The most expensive paraiba tourmaline is a pair of earrings. One weighed 7.46 carats, and the other 6.81 carats, and they sold for about $2.78 ...
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Discovered in Brazil in the 80s, these stones are bringing new colour to high jewellery collections
In September a cushion-shaped 5.44-carat Paraiba tourmaline ring flew past its US$60,000 upper estimate in auction at Bonhams New York to sell for US$533,900. This is bidding territory more ...
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On the trail of the Paraiba tourmaline: In search of one of the world's rarest gemstones
The history of this rare stone is documented in Paraiba: The Legacy of a Colour, written by Kevin Ferreira, a gemmologist and specialist in this specific tourmaline through his family’s ...