Note: if you’re wondering what the technical difference between a diamond and a gemstone is, the answer is…the market! Diamonds – the kind most people buy, anyway – in general are artificially inflated the world over. They’re literally so expensive because the market is controlled to keep them so expensive. Same with the difference between Diamonds and Gemstones. People will pay more for diamonds so..diamonds cost more. — Sotheby’s (@Sothebys) April 4, 2017 The Pink Star Diamond was mined by De Beers in Africa and is the largest known diamond having been rated vivid pink. The 59.6 carat stone was sold at Sotheby’s auction house for a staggering $83 million in late 2013, however the buyer defaulted and the ring was returned to Sotheby’s where it has been valued at a mere $72 million.