Synthetic diamond and natural diamond different

1 Crystal habit: Synthetic diamond often: cube, octahedron, and both poly shape
Natural diamonds often: octahedron, rhombic dodecahedron, and both poly shape, as well as common triangular flakes twins
(2) Color: synthetic diamonds often brown, and is often irradiated to change color into blue, orange, pink, brown and golden yellow
98% of natural diamonds are colorless - yellow series.
3 surface and internal texture: Synthetic Diamonds: You can display or cross-shaped dendritic texture
Natural Diamond: The surface dents or Triangle Triangle common, often show the internal structure associated with the texture.
4 magnification: Synthetic Diamonds: seed and phantom zone, various forms of metal inclusions
Natural Diamonds: no metal inclusions
5 Visible absorption spectrum: Synthetic Diamonds: None 415.5nm absorption lines obtained in liquid nitrogen under low temperature conditions can be measured 658nm and

500nm absorption peak total absorption of the following
Natural diamonds: mostly 415.5nm absorption lines
6 UV fluorescence: Synthetic Diamonds: usually no fluorescence under long-wave, and shortwave under yellow-green, orange and yellow fluorescent, the "Maltese Cross

zoning" phenomenon, while there are obvious phosphorescence
Natural diamonds: mostly under long wave blue and white fluorescent, weak or displaying inert under shortwave.
7 CL instrument: Synthetic Diamonds: UV fluorescence distribution with similar characteristics, different growing areas show different fluorescence band
Natural diamonds: mostly irregular
Because natural diamond growth when the environment is changing at all times, however, the growth of synthetic diamond environment is static.
8 IR: Synthetic Diamonds: 1130 Cape beam absorption band
Natural diamonds: 1176,1282 beam absorption bands.
9. Conductivity: Synthetic Diamonds: some may have conductivity or thermal conductivity
Natural Diamond: In addition to polycrystalline diamond is a semiconductor outside, are not conductive, and is not magnetic.
10 Other: such as exception birefringence.