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Cordierite : (Mg,Fe)2Al3(AlSi5O18)

Copyright © Rob Lavinsky & irocks.com
 
 
minID: QAC-4ND

Cordierite : (Mg,Fe)2Al3(AlSi5O18)

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 12 cm x 10 cm x 7 cm

12 x 10 x 7 cm. Cordierite from this locality sets the standard for the species. Unlike the ugly material from most places, it is actually pretty here - sometimes. It has a waxy brown shoe-polish look to the surface on the best specimens, such as this one. This was collected by Bob Whitmore in the 1970s and is a highly significant specimen for its isolated, beer-can sized crystal standing straight up from matrix. Museum quality, for this rarity and important study species. Ex. Robert Whitmore Collection.


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Photo added: 14th Sep 2009