What colour is a sapphire?

The sapphire is instantly linked to an intense sky-blue colour. In this colour, the gemstone is also the most beautiful and most valuable. But not all sapphires are blue. They exist in different colours, including yellow, purple and orange. All sapphires were formed from crystals of the mineral corundum. The presence of certain metals in the corundum determine the final colour of the sapphire .

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