|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from India > Cordierite var. Iolite (Viking Compass)|
|Mineral:||Cordierite var. Iolite (Viking Compass)|
|Description:||Polished transparent iolite, the transparent color-change variety of the mineral species cordierite. The iolite color changes from blue-purple to yellowish when rotated and depending on illumination angle, a characteristic used by Viking navigators.|
|Overall Size:||29x20x14 mm|
|Archived:||For reference only|
|Buy similar:||Minerals from India, Pakistan, Afghanistan > Mica & other Silicates|
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