Ruby is a form of Aluminium Oxide (Red Corundum). It is made up of Corundum (Al2O3), and Chromium impurities (Cr3+), which are responsible for its wonderful red coloration. Ruby is the most expensive gem in the [...]
Ruby is a form of Aluminium Oxide (Red Corundum). It is made up of Corundum (Al2O3), and Chromium impurities (Cr3+), which are responsible for its wonderful red coloration. Ruby is the most expensive gem in the [...]