The rich gem resources in the world are mainly concentrated in Africa, Азия, America and Oceania. 1. Africa The African continent is rich in gem resources and is known as the “World Gem Warehouse”. It is rich in diamonds, Рубини, сапфири, golden emeralds, Изумруди, Аквамарин, Аметист, peridot and turquoise, among which diamonds are the most […]
