Tags: Kiểm định tên loại đá quặng và cấp chứng nhận chất lượng

Expertise Accreditation of type of Gemstones Ore and quality certificationGemstones and mineral ores have been exploited and traded in Vietnam and many countries in the world, accompanied by traders or state management need to determine the name of ore and quality gemstones rock.Many gem trading and trading companies to be carried the name of "KING" and "QUEEN" to attract the attention of the buyer but you dare to believe what their say, commit. . . or not is a completely different matter. ...