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Other Natural Mineral Crystals

Iolite

Violet-blue gem that changes colour as you turn it.

Natural colours
Mineral groupCordierite
Chemical formula(Mg,Fe)₂Al₄Si₅O₁₈
Crystal systemOrthorhombic
Hardness (Mohs)7 – 7.5

Supplied by weight or by piece — raw, polished or made into jewellery. Sizes, grades and quantities on request.

About the stone

What is Iolite?

Iolite is the gem variety of cordierite. It is strongly pleochroic — violet-blue from one side and pale grey-yellow from another — and was used by Vikings as a "sunstone" for navigation.

India is one of the main sources of iolite, especially Odisha and Tamil Nadu.

Traditionally associated with

  • Intuition
  • Vision
  • Inner guidance
  • Calm

Care & cleaning

Clean with lukewarm water, a drop of mild soap and a soft brush, then dry with a soft cloth. Store apart from softer stones to avoid scratches.

Bulk & wholesale supply

Order Iolite in bulk

We supply raw stones, tumbled and polished pieces, carvings, beads and finished jewellery such as pendants and bracelets by the kilo or by the piece. Tell us what you need and we will reply with availability, sizes and lead time.

Photo credits
  • Photo: Didier Descouens — CC BY-SA 4.0, via Wikimedia Commons — source
  • Photo: Shannon Heinle — CC0, via Wikimedia Commons — source
  • Photo: Parent Géry — CC BY-SA 3.0, via Wikimedia Commons — source