A ruby is a
pinkish red to blood-red colored gemstone, a variety of the
mineral corundum (aluminium oxide). Ruby is one of the
most popular traditional jewelry gems and is very durable.
Other varieties of gem-quality corundum are called
sapphires.
Ruby is
distinguished for its bright
red color, being the most famed and fabled red
gemstone. Beside for its bright color, it is a most
desirable gem due to its hardness, durability, luster,
and rarity. Transparent rubies of large sizes are even
rarer than Diamonds. Ruby is the red variety of the
mineral Corundum.
