Traditionally, sapphires are usually associated with the color blue. That’s why, in addition to their beauty, sapphires and rubies are two of the best jewelry stones. As a result, sapphires and rubies are tough and relatively scratch-resistant. Next to diamond, sapphire and ruby (both corundum) is the hardest mineral known and is very compact and dense. Sapphires of the top blue color over 5 carats, if clean, are rare and expensive. Despite the huge gems in museums and Royal collections, sapphires available on the market are of a more modest size. Blue sapphires are available in many shades and tones, ranging from light Ceylon ‘cornflower’ blue to an intense royal blue and all different shades of blue in between.
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