Ruby is the red variety of the mineral corundum, the second hardest mineral known to exist, surpassed only by diamond. Ruby is known as the stone of love. It is worn in all types of jewelry. Generally, ruby is quite durable. Still, rubies are subject to chipping and fracture if handled roughly.
Rubies are often heat treated to permanently improve their color and clarity.
Hardness Ruby has a hardness rating of 9. Where Found Ruby is found worldwide. The finest stones are from Myanmar. Brownish-red ruby are from Thailand. Mystical Properties Ruby is said to open one's heart to love.