The beautiful chromatic varieties of Garnets

Did you know that garnets are not only red but of all colours? Some change colour, and there is even a blue garnet.
What separates the main species is ultimately in its chemical composition, namely whether calcium, or magnesium, or aluminium, or iron2 +, or iron3 +, or chromium, or manganese or titanium are present, offering us the beautiful chromatic variety that you can see in the photo.

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