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| Matrix properties |
| Molecular weight | 101,94 |
| Crystal lattice parameters, Å | a = 4.748 |
| с =12.957 |
| Refraction indices | Nm= 1.767 |
| Np = 1.759 |
| Birefringence | 0.0082 |
| Density, g/cm | 3.98 |
| Moh's hardness | 9 |
| Melting point, °C | 2050 |
| Syngony | triangular |
| Axial characteristics | monoaxial |
| Cr2O3 concentration, mass. % | 0,5 — 4,0 |
| Color | Pigeon blood |
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Ruby crystals (Al2O3:Cr3+) are grown by Czochralsky technique. It allows to obtain high quality samples and to manipulate their color purposefully — from light-red to pigeon's blood color. Laboratory research studies verified these crystals to be the complete analog of naturally occurring ruby.
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Developted
by - Pixelhead