IGI Certificate 0.5ct Round Lab Diamond 5mm HPHT 3EX D/F Color VVS1 Clarity DiamondSPECIFICATIONS Certificate: Yes Certificate Type: IGI Item Type: Beads Round Item Weight: 0. 5 Carats Main Stone: Lab Grown Diamonds Treatment: HPHT Size: 5 mm Purity: VS2 Color: D (the best) HPHT (High Pressure High Temperature) Diamonds How it works: This method mimics the natural conditions deep inside the Earth. Carbon is placed in a special press and subjected to extremely high pressure (over 5 GPa) and very high temperatures (above 1,400 C).
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