COLOR: D E F G H I J
CLARITY: VVS VS SI
CUTTING: IDEL EXCELLENT
Ring, Earrings, Bracelet, Pendant with Moissanite/ lab grown diamond/Eemerald your personal jewelry maker.
As HPHT method involves using metal catalyst, it is hard to avoid some metals entering the crystal during growing process, so HPHT diamonds might be magnetic. And if the magnetism is too strong, diamonds will not be able to pass the diamond teste. Because CVD diamonds are formed by mere gas, they can be produced without magnetic and are able to pass the diamond tester pen.
More recently, the Geophysical Laboratory of the Carnegie Institution of Washington, USA achieved a CVD synthesis rate of 100μm/h to produce a 10ct, half-inch thick single-crystal diamond.
To further increase the size of lab grown diamond crystals, it is possible to grow colorless diamond single crystals in three dimensions at the inch scale (approximately 300ct) by sequentially growing them on six faces of the diamond substrate using CVD. High-pressure, high-temperature heat treatment has also been found to improve the color and hardness of synthetic CVD diamonds.
*One carat is equal to 0.2grams.
*The waist diameter of the diamond will be affected by the cutting method and proportion. So the same weight diamonds may have different waistlines.