Iolite (Dichroite or Cordierite)

The name "iolite" comes from the Greek words "ios" meaning violet and "lithos" meaning "stone". Iolite is also called "Dichroite", referring to it's strong pleochroism characteristic. The origin of the reference to iolite as a "water sapphire" is unsure, but thought to date back to the Vikings who used it as a navigational aid.

The distinct characteristic of iolite is it's strong pleochroism. The stone may be seen as violet blue, yellow gray or a light blue based on the viewing angle. Iolite can be found in colourless, pale blue, violet, yellow and gray in colour.

Inclusions

Generally free of inclusions. Inclusions could be found under magnification such as thin plates of iron oxide.

Caring

Do not clean in ultrasonic cleaner or a steamer.

Iolite is heat sensitive, abrupt temperature changes could cause fracturing.

Avoid chemicals as chemical may destory the stone.

To clean, use warm, soapy water and a soft brush.