A 24-carat fancy intense pink diamond ring, known as the 'Bulgari Pink' and hailed as the 'Mona Lisa of pink diamonds,' sold at Christie's Geneva sale for 12.1 million Swiss francs ($14.6 million). Believed to originate from India's Golconda mines and owned by one family since the 1950s, it led a sale featuring nearly 300 historic jewels.
