- The red corundum, the color of which is due to the vanadium or to the chromium is the ruby.
- The blue corundum is the sapphire.
- Corundum, in the other colors, is sapphires with as adjective that of the color: sapphire pink, yellow sapphire, sapphire orange, sapphire green, purple sapphire...
To know more about the Corundum, see Mindat.org->
