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Mineral colour

Fluorite Purple minerals
The most common purple minerals are amethyst, a variety of quartz, and purple fluorite. Because they can be exactly the same colour, we have to use different properties, like crystal shape and hardness to distinguish between them. Quartz is harder and will always scratch fluorite. Fluorite often has cubic or octahedral crystals but you will never find cubic or octahedral quartz crystals!

Other minerals can be purple. Lepidolite is usually pink or lilac in colour. Charoite is always purple and can be carved or cut into gemstones.

Charoite Lepidolite Amethyst
Fluorite (top right), charoite, lepidolite and amethyst are all examples of purple minerals.

Return to the Colour wheel to learn more about mineral colour.