This is due to its tight bonding of atoms.
This means sapphires are less prone to chipping and cracking by force such as from knocking or dropping. Not only that, sapphires are tougher than diamond. Hardness of a pink sapphire being one of the highest also means higher lustre than that of a lower hardness gemstone of the same colour. That means it is highly resistant to scratches, specially from dust in our environment. 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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