Gemmy Iolite (Cordierite)


Origin: Madagascar


Iolite is the gem variety of the mineral Cordierite. It describes the transparent to translucent form of this mineral. Iolite ranges in colour from  light to deep blue, and often has a purplish tinge to it.


Iolite displays the optical effect of pleochroisman, an optical phenomenon in which a substance has different colors when observed at different angles, especially with polarized light. The effect is that viewed from the side, Iloite turns to an amber to yellowish-brown colour as can be seen in the photos.


The photos were taken in bright sunlight to bring out their best colours.

Gemmy Iolite (Cordierite) - Madagascar

  • Gemmy Iolite (Cordierite)

    Origin: Madagascar

    Size: 20 mm x 16 mm  x 6 mm, 4 grams

© 2019  Exquisite Stones   -   309 Cliffendale Drive, Faerie Glen, Pretoria   -

  • Instagram
  • Facebook Social Icon