![]() Please care to look after such a precious gemstone. This is due to its tight bonding of atoms.īlue sapphires are durable, but not indestructible. 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 blue sapphire being one of the highest also means higher lustre than that of a lower hardness gemstone. That means it is highly resistant to scratches, specially from dust in our environment. Sapphires are the second hardest mineral in the world. You can shop a range of natural blue sapphire colours in our collection and these are free of any colour enhancements. Diffusion and surface coating are synthetic treatment methods and they can also give a sapphire an appearance of blue. Treatments such heat treatment can also alter a colour of a sapphire to blue by simply melting its titanic and iron into the crystals structure. Naturally, a combination of iron and titanium trace elements in the crystal system of aluminium oxide makes a blue sapphire. Additional trace elements or impurities combined with these base elements give breathtaking sapphire colours. ![]() HOW DO BLUE SAPPHIRE GEMSTONES GET THEIR COLOUR?Ĭorundum in its purest state is aluminium oxide (Al2O3), which is a colourless sapphire. Corundum belongs to trigonal crystal system. Blue sapphires are a rare, precious gemstone.ĭifferent minerals belong to different crystal systems based on their way of repeating pattern of atomic arrangement. Sapphire and rubies are of corundum mineral specie which is an aluminium oxide.īlue sapphires are a corundum mineral that contain trace elements of titanium and iron which gives them the appearance of blue colour.
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