The sapphire is the blue variety of the Corundum family. This gemstone is very desirable because of its beautiful color, luster, durability and hardness rating. In terms of durability, the sapphire comes in second to the diamond.
Thes...
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Sapphires are one of the hardest gems, and grouped with the top tier of precious stones: diamonds, rubies, and emeralds. The word sapphire comes from the Greek “sappheiros” meaning “blue stone.” While some sapphires are blue, they also appear as other colors.
In general, gemstone color has three parts: hue, saturation, and tone. Hue is the primary color of the gemstone. Saturation is the brightness of the hue. Tone refers to the range of light...
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