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Sapphires and rubies - precious stones, one of the most remarkable and important minerals between colored stones. Rubies and sapphires belong to the family of the mineral corundum, they are the most known, loved and popular than the other precious stones. With a hardness of 9, sapphires and rubies - are extremely solid stones and are ranked secondly after diamonds, in the world of natural minerals. Because of their hardness and durability, sapphires and rubies great fits for their use in jewelry for almost any purposes. Color - the overriding factor in determining the value of corundum, is much more important than its purity. Corundum is rarely pure in comparison with diamonds, and even very expensive stones can have moderate or even visible to the naked eye large inclusions. Very subtle differences in color can lead to very serious differences in price .. Beautiful stones with good color and clarity are always very rare and unusual, buy ruby ring in white gold. The best and the most valuable colors for blue sapphires - violet-blue medium shaded color or medium shaded to dark saturated color .. Compared to them, sapphires with overly saturated and dark colors, as well as not very colored or very bright sapphires lose their value, in tens or hundreds of times. And for rubies the most appreciative is bright, saturated, slightly purple-red color (the color of pigeon blood) Sapphires and rubies both are members of the corundum family with the same crystal structure. The basic chemical formula is AL2O3, same for ruby and sapphire. The presence of trace elements such as chromium, iron, vanadium and titanium, gives to corundum the widest range of colors, in the world of precious stones .. When corundum is red, it is considered to be a ruby ??corundum any other colors of ??corundum are called sapphires. However, the identification of red corundum as rubies or sapphires is very relative, because since there are no internationally accepted limit values??. Any gemologist can describe the same stone as purplish-red ruby or purple-red sapphire, and in both cases he will be right, ruby bead necklace. As mentioned above, sapphires have very rich palette of colors among all the precious stones in the world .. It was introduced by the name of fancy sapphire - to describe the sapphires of all colors, but the most valued are noble blue stones .. Quaint fancy sapphires are available in amazing range of colors, including yellow, green, purple, pink, brown, orange, black (conventionally but in fact, an extremely dark blue) and white, that is - colorless.
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