AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Tanzania > Cordierite var. Iolite (Viking Compass)

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Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

 
Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

Cordierite var. Iolite (Viking Compass) from Manyara Region, Tanzania

DESCRIPTION:No. 82516
Mineral:Cordierite var. Iolite (Viking Compass)
Locality:Manyara Region, Tanzania
Description:Transparent iolite gem rough, 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. Weight: 2.2 grams. Ex. Miller collection T1814; acquired in 1997 from S. Ulatowski from old stock
Overall Size:13x13x10 mm
Crystals:
Archived: For reference only

 

 

 

 

 

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