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Sapphire is known in the mineral world as corundum, whose crystal structure is composed of aluminum oxide. On a scale of hardness sapphire is the strongest gemstone after diamond. The most valuable are rare stones are those with rich cornflower blue color. More often found are stones with blue, green, yellow, white, pink and brown colors. The price of natural sapphires are very rare and expensive, gemstone jewelry. The more pure blue color has natural sapphire, the higher is its price. Darker or paler stones are less valuable. The price also affect stone brightness, faceting and carat weight. Sapphire of the better quality has the purity which is visible with the naked eye, and some inclusions are detected under a microscope. More common are sapphires weighing under 2 carats, but stones from 5 to 10 carats also encountered. With what can often be mistaken sapphire gemstone? Often as a sapphire serves colored cubic zirconia. Tips for Choosing. Sapphire origin strongly influences its value. Homeland of the best sapphires is Kashmir. The color of these stones is cornflower blue. Moreover, Kashmir sapphires keep their color in artificial light, that for this gemstone is unusual. However, the Gemological certificate that confirms the mineral mining in Kashmir, does not guarantee its quality. Burmese sapphires can also have excellent quality. Sapphires from Sri Lanka are usually paler. The darkest and therefore the cheapest are sapphires mined in Australia. Resume: it is better to search sapphires from Kashmir with pure cornflower blue, with a good faceting, weighing several carats, which inclusions shouldn't be visible with the naked eye, buy sapphire jewelry.
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