วิธีเลือก CVD และ HPHT สำหรับการปลูกเพชร?
Friends who often follow the cultivation of diamonds ask these questions: “CVD diamonds are relatively expensive in the market. Does that mean it is better for CVD to cultivate diamonds?” “What is the difference between CVD diamond farming and HPHT diamond farming?” “ซึ่งดีกว่า, CVD diamond or HPHT diamond?” “CVD diamond or HPHT diamond?” …