HPHT/CVD
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2021-7-18 · Source: Gems & Gemology, Fall 2016, Vol. 52, No. 3. It's easier to find a VVS diamond among CVD diamonds than among natural diamonds. An analysis of 1000 diamonds in each of the three categories shown in the graphic above conducted by GIA and published in Gems & Gemology, Fall 2016, Vol. 52, No. 3 found that just over 25% of CVD diamonds could be given clarity grades of VVS2, .
2020-8-9 · HPHT . 。. 1300-1600 °C, 870,000 ( 5,998,440 )。. 。.,。., .
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2021-10-9 · FACTORY SUPER QUALITY DEF VVS SYNTHETIC DIAMOND HTHP CVD LAB GROWN LOOSE DIAMOND POLISHED DIAMOND. Diamond Type:Synthetic (lab created) Diamond Carat Weight:0.1-0.8ct Diamond Certificates:Certified Diamond Shape:Roun... David Ebeling. USA. Date Posted: 26-Jun-2021.