For more than 2,000 years, the Golconda mines on the banks of the Krishna River in southern India produced virtually all the world's fine diamonds. Many of history's most famous diamonds claimed a Golconda origin, and these included the 105-carat Koh-i-noor (replica, above), 45-carat Hope Diamond, 140-carat Regent Diamond, 189-carat Orlov and the 70-carat Idol's […]