Another example is the way titanium traces result in blue sapphires. These trace minerals are a natural part of sapphires from millions of years ago when these gems formed underneath the Earth’s crust.įor instance, chromium is responsible for pink sapphire colour. Within each corundum crystal, there are traces of other minerals that can change the way the gemstone reflects and refracts colour. Trace elements cause differences in sapphire colour. A pink sapphire that has been cut into a faceted oval shape What causes sapphires to be different colours? It’s simply another gem variety of the same mineral. That’s because gemstones formed from red corundum are called rubies. The only colour that sapphires do not come in is red. ![]() Scroll down to get more information about each sapphire colour variation. Sapphires exist in a rainbow range of colours – as blue, pink, green, yellow, orange, purple, colourless and black gemstones. They’re formed from a mineral called corundum. Sapphires are one of the ‘Big Three Gemstones’, alongside emeralds and rubies.
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