Czochralski Pulled Ruby Antique Cushion
3 years ago
7
Laboratory created (True, Cultured) Czochralski Pulled Ruby. Stones cut from the historical Union Carbide laser ruby ordered by Pentagon in 80-s. Stones are flawless; mostly pigeon red with true vitreous-adamantine luster and have perfect AAA cut quality
Chemical composition AI2O3 + Cr
R.I. = 1.766 - 1.774
Specific gravity: 3.97 - 4.05
Mohs Hardness 9
Crystal system: Hexagonal
Few stones 8x6mm
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