Fluorite is a beautiful mineral that occurs in a wide variety of colours. 'Rainbow fluorite' exhibits zones of colour within the same crystal.
The different colours of fluorite are caused by impurities. In its purest form, it's colourless and transparent.
Fluorite crystals are generally well-formed but also crystallise in masses. In this crystal habit, crystals grow as one large, shapeless mass.
The mineral fluorite is soft and fragile, so it must be handled carefully. Internal fractures and minor surface anomalies are not uncommon.
Fluorite from China is often heated, which lightens and enhances the colour. This material is often sold as 'Candy' or 'Watermelon' fluorite.
EUDIALYTE
