Tags: Giám định chất lượng đá quý tự nhiên

Gem ore quality assessmentEach type of stone or metal ore will have different names and qualities, so to determine its value, it is necessary to analyze the quality of natural gemstones or gem ore quality assess through samples. Natural stone or metal ore mines always have the composition of essences and impurities, the percentage of volume and essence, the higher their commercial value.In addition, there are many other criteria to evaluate the quality such as Purity Moh Clarity ...