Enhancements
Violet sapphire is always heat treated to produce, intensify or lighten color and/or improve color uniformity and appearance.
More information on gemstone enhancements.
Violet Sapphire ...
Purple/violet sapphire
Highly prized by collectors, purple/violet sapphires (also once known as oriental amethyst) can display rich purple to violet-pink colors reminiscent of orchids.
Yellow sapphire ...
Violet sapphires can be beautiful gems. Since they do not fall in the ruby or blue sapphire category they are much lower in price. They are one of the bargains in the sapphire market.
When corundum suitable for gem purposes occurs of other colors, such as green, yellow, or violet, the gems are sometimes known as green, yellow, or violet sapphires, respectively, or by the name of another gem which they closely resemble in color, ...
Synthetic purple or violet sapphire resembling amethyst in color glows bluish-white in short wavelength u.v. light and red in long wavelength u.v..
Natural yellow sapphire will sometimes fluoresce in short u.v. light; synthetic yellows will not.
Pink and violet sapphires from Sri Lanka are extremely intense and vibrant in their coloration and are generally much rarer than blue sapphires. Kanchanaburi in Thailand and Pailin in Cambodia are renowned for deep blue, even colors.
Tanzanite
Tanzanite is similar to a violet sapphire.
Temper
Temper is a process of heating and cooling metal to harden it.
Most of the fine sapphire available today comes from Sri Lanka, which produces a wide range of beautiful blues with rich saturated hues. Pink and violet sapphires from Sri Lanka are extremely vibrant in color and are generally rarer than blue ...
 See also: Sapphire, Color, Gemstone, Ruby, Stone
  
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