Humans have been searching, mining and using gemstones for nearly 6000 жылға. Мысалы, the famous Chinese “Хетиялық Джейд” has been discovered as early as the primitive society. Толық емес статистикаға сәйкес, одан да көп 600 kinds of gem mines discovered and mined in the world, and these gem resources are mainly distributed in […]
