Typically red, sometimes with hints of brown, purple or pink; must meet certain hue and color saturation standards to be called a ruby and not a sapphire.
Corundum. Ruby is the red variety of corundum; all others are sapphires.
Ruby has held high value throughout recorded history. Ruby has long been associated with passion and desire, as well as with courage and power.
Use in jewelry:
Because of its beautiful red color and its long association with passion, desire and love, ruby is a natural fit as a romantic jewelry gift.
9 (1 softest to 10 hardest)
Heat treatment is commonly employed to intensify color and dissolve impurities. Ruby can also be diffusion treated to add color to the stone. All treatments must be disclosed.
Clean with mild soap and a soft cloth. Steam and ultrasonic cleaning is safe for untreated and most heat-treated ruby.