Colored Gemstone
Artificial colored gemstones are corundum single crystals formed by doping different types of transition metal ions into corundum. Because the doped transition metal ions absorb part of the visible light band, they present gorgeous and moving colors. Artificial colored gemstones are the same as natural gemstones. They have the advantages of high hardness (second only to diamond), bright colors (such as pigeon blood red, sea blue, emerald, etc.), high refractive index, and large dispersion coefficient. Important raw material for jewelry and decorations.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Lattice constant | a=4.785A, C=12.991A |
| Growth Method | Tira method |
| Moh's hardness | 9.0 |
| Refractive index | 1.76-1.77 ( visible light band) |
| birefringence | 0.008-0.01 |
| Chromatic number coefficient | 0.018 |
| Density | 4.0g/ cm3 |
| Melting Point | 2050°C |
| Crystal blank size specification-pigeon blood red | φ80mm×120mm |
| Crystal blank size specification-sea blue | 60mm×120mm |
| Crystal blank size specification-emerald | φ40mm×120mm |
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