It is characterized by a hardness of 9 on the Mohs scale, just after moissanite which has a hardness of 9.5, and below diamond which has a hardness of 10. Sapphire is actually a variety of corundum with traces of other chemical elements that give it its color. ![]() In fact, there are many varieties of sapphire gemstone that can be of any color, from white (or colorless) to green. ![]() Blue sapphire is by far the colored gemstone the most used in jewelry.įor most people, sapphire means blue sapphire as this is the most famous type of sapphire stone. sapphire) and certainly the best known with diamond. Sapphire is one of the four most precious gemstones (which are diamond, ruby, emerald, and.
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