Unique Czochralski Pulled Ruby Octagon Emerald Cut 18x13 mm, 23.44 Carats
3 years ago
9
Stunning Laboratory created (True, Cultured) Czochralski Pulled Ruby Octagon Emerald Cut 18x13 mm (10 mm deep). Stone cut from the historical Union Carbide laser ruby ordered by Pentagon in 80-s. Stone is flawless; pigeon blood color 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
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