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Learn about Iolite

Iolite is the gem quality version of cordierite. Its name is derived from the Greek word ‘ios’ meaning violet. Although iolite is usually cut into a faceted gem, it is also frequently cut into a cabochon. Iolite measures 7-7.5 on the Mohs scale of hardness, although it is a fairly brittle stone. The stone is pleochroic, which means it shows different colours when viewed from different angles. Find out more....

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Related Articles

  • Iolite

    Iolite

    Top quality iolite rivals the best Tanzanite in both colour and saturation. If mixed with blue Sapphire and purple Tanzanite it is very hard to distinguish. The most desirable is the blue-violet coloured crystals.

    Sarah Arnold 15 Oct 2011
  • Iolite Information

    Iolite Information

    Iolite is the transparent version of the mineral known as Cordierite. This aritcles explains more about this gemstone.

    Theodore Marshall 5 Oct 2011