![]() ![]() ![]() Sapphires are the second hardest mineral in the world. Pink sapphires are a rare, precious gemstone that is used in making fine jewellery.ĭifferent minerals belong to different crystal systems based on their way of repeating pattern of atomic arrangement: corundum belongs to trigonal crystal system. Pink sapphires are corundum mineral that contains trace elements of chromium which gives them the appearance of pink colour but not intense enough to call it a ruby. Sapphires and rubies are of corundum mineral specie which is an aluminium oxide. ![]()
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