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Schorl : Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH), Microcline : KAlSi3O8

Copyright © Rob Lavinsky & irocks.com
 
 
minID: 6JL-UEF

Schorl : Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH), Microcline : KAlSi3O8

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 6.6 cm x 5.9 cm x 3.7 cm

OK, schorl is not all that glamorous a mineral usually, but it is a different story when it forms perfect, glossy crystals such as this 2-cm one, on a fine accenting matrix - in this case, a cluster of euhedral feldspar crystals. 6.6 x 5.9 x 3.7cm

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Photo added: 14th Feb 2006