Sapphire is classified as one of the traditional four precious stones along with emerald, ruby and diamond. High quality stones are limited in nature but gems of good color and size are available (for a price).
Sapphire comes in a wide range of colors including; yellow, green, violet, purple, blue, pink, orange, black, brown and colorless with blue being the most popular in NIGERIA . When buying Sapphires you must look at the intensity of their color for this factor often outweighs the size and the clarity of the stone, however, be careful not to get a stone that is too dark or inky. Silky inclusions can often give a Sapphire a velvety look, so watch out for this highly desirable trait. Finally, beware of beautiful sapphires with very low prices, their beauty may be only surface deep
Sapphire (bested only by Tourmaline) comes in a wide range of colors including; yellow, green, violet, purple, blue, pink, orange, black, brown and colorless.
Transparent to opaque, Sapphire is a Type II gemstone and is usually included (though usually cleaner than ruby). Top gems should be eye-clean with no inclusions visible to the unaided eye. Extremely fine silk inclusions throughout the stone can enhance the value of some Sapphires like the Kashmir.
Phenomena: Sapphire often exhibits the phenomena of color change as well as Asterism, a pattern of reflected light that forms star patterns (usually 6-rayed), typically seen in star rubies and star sapphires.