Gemstones are treasured for their exquisite beauty, sentimental symbolism and—perhaps most importantly—their market value. These precious pieces of rare rock, once polished and cut, can be worth tens ...

A dazzling selection of Burmese rubies, Kashmir sapphires and rare colored diamonds are on the block at jewelry auctions by Christie’s and Phillips this fall, indicating the enduring investment ...

Two world records were set today (June 8) when a ruby and pink gemstone sold for $34.8 million each at Sotheby's, making them the most expensive colored gemstone and purplish-pink diamond ever sold.

Until recently, only emerald, ruby and sapphire were officially called precious gems. Everything else was called semi-precious. The precious categorization is a reference to value: a really fine ruby, ...

Eternal Pink and Estrela de Fura, two of the world’s most precious gemstones have been unveiled at the Dubai Diamond Exchange (DDE). The pink diamond and the ruby were unveiled by Sotheby’s and hosted ...