< Ruby Gemstones and Jewelry – Crystal Point Gems And Metaphysical Store
Ruby Gemstones and Jewelry | Crystal Point Gems And Metaphysical Store

Ruby Gemstones and Jewelry


Pink to red gemstone-quality corundum is called ruby. Its chemical formula is Al2O3Cr. The chromium gives ruby its color. Ruby exhibits a trigonal crystal system and a Mohs hardness of 9. Citation