Specimen #2565

Name: Iolite (Cordierite)

Type: Gem

Locality: Brazil

Favorite? N

Fluorescent? N

Size: 5.08 mm

Weight: 0.44 ct

Acquired: 2021-10-02

Source: Arkenstone Auction

Label: N

Comment: Iolite translated from Greek literally means "violet stone". These gems are sometimes known as "Water Sapphire" in various corners of the gem world, but it is truly gem grade Cordierite. Iolite is strongly pleochroic and shows a strong blue color one direction, a violet color another direction, and a yellowish color in the third direction. This stone is a very very slightly included with a "Round Brilliant" cut, and shows a decent color change when rotated on its different axis. A good representative gemstone of this classic material.

Minerals: Cordierite (Mg2Al4Si5O18) Iolite

There is one picture on file

M02565-01.jpg: