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 commonly ...
Miners work to extract gemstones including kunzite and tourmaline in a mine in the Parun Valley in Afghanistan's Nurestan province. In doing so, they unearth lithium-bearing ore. Warning ...
It is rare for new gemstones to be discovered. In the 20th century, kunzite, tanzanite and Paraiba tourmalines are the noted few, but the scarcity, vibrant colour and ever-increasing demand for ...