Sri Lanka: From Mine to Market, Part 1 | Research News
· Gemstone mining in Sri Lanka is mostly from secondary deposits. The gravels yield sapphire, ruby, 'seye and other chrysoberyls, spinel, garnet, beryl, tourmaline, topaz, quartz, and many other gemstones. Sri Lanka's gembearing gravels, called illam, are some of the richest in the world. The island was blessed with geological conditions that provide an ideal .