Humans have been searching, mining and using gemstones for nearly 6000 سنين. على سبيل المثال, the famous Chinese “اليشم هيتيان” has been discovered as early as the primitive society. وفقا لإحصائيات غير كاملة, there are more than 600 kinds of gem mines discovered and mined in the world, and these gem resources are mainly distributed in […]
