Gemstones fall into two categories: Precious or Semi-Precious. Rubies, sapphires and emeralds have the distinction of being Precious Gemstones because of their rarity. All of the other Gemstones are placed in the Semi-Precious category for they are more readily available. All Gemstones have certain properties that determine its’ value. A Gemstones color is the most important aspect in differentiating one stone from the other. There are three components that comprise the color of a Gemstone; they are hue, tone and saturation. The hue is the specific color of the Gemstone and it should have the purest hue possible. Tone is the level of color that is seen in the stone and saturation is how strongly the actual color shows. The cut of a Gemstone describes its shape and how it is fashioned and the clarity also contributes to its beauty, however, unlike diamonds, most gemstones will have enhancements to improve color and clarity. It is extremely rare to find Gemstones without the use of any treatments or enhancements and these Gemstones can still be extremely valuable. All Gemstones are measured in carats just like the diamond.