How Much You Know About Ruby?
Chemical Formula Al2O3 Color Red Hardness 9 Crystal System Hexagonal Refractive Index 1.76 – 1.77 Specific Gravity 3.9 – 4.1 Transparency Transparent to opaque Double Refraction 0.0008 Luster Vitreous to adamantine Cleavage None, but may exhibit parting Mineral Class Corundum Ruby The Most Desirable Gemstone Ruby known as Manik in […]