Gemstone Education: What You Need to Know About the BIG THREE!
Variety: Ruby Species: Corundum Refractive Index: 1.762 – 1.770 Pleochroism: orangey red, slightly purplish red Specific Gravity: 4.00 Mohs Hardness: 9 Element: Earth Chakra: Root Commanding the highest per carat price of all colored stones, the finest rubies range from a vibrant red to a slightly purplish red… Read More