Sapphire (Greek: sappheiros, 'blue stone', which probably referred
instead at the time to lapis lazuli)
is a typically blue gemstone variety of the mineral corundum.
The sapphire is one of the three gem-varieties of corundum,
the other two being ruby (defined as corundum in a shade of red)
and padparadscha (a pinkish orange variety).
Although blue is their most well-known color,
sapphires may also be colorless and they are found in many colors
including shades of gray and black.
From Wikipedia, the free encyclopedia