A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Cordierite |
|---|---|
| Description | Cordierite is a silicate with the mineral formula of Mg2Al4Si5O18. Cordierite is not a well known mineral but its gemstone variety iolite is popular among gemstone collectors. Its unusual blue-violet color is attractive and is compared to a light blue sapphire with a purplish tint. Cordierite is strongly pleochroic and is sometimes referred to by the synonym dichroite a greek word meaning two colored rock. This sample is approximately 7 cm. |
| Location | Canada ▹ Ontario. Near Chapleau. |
| Photographer | Shannon Heinle. 2001-11-29. |
| Collection | University of North Dakota Mineralogy Collection #5008. |
| Key words | cordierite, iolite, silicate |
| Tech details | 490 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1862 |
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