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Potassic-richterite (Var: Strontian Potassicrichterite) : K[(Ca,Sr)Na][Mg5]Si8O22(OH)2, Potassic-magnesio-arfvedsonite : [K][Na2][Mg4Fe3+]Si8O22(OH)2, Microcline : KAlSi3O8

Copyright © Pavel M. Kartashov collection & photo
 
 
minID: GM0-H1D

Potassic-richterite (Var: Strontian Potassicrichterite) : K[(Ca,Sr)Na][Mg5]Si8O22(OH)2, Potassic-magnesio-arfvedsonite : [K][Na2][Mg4Fe3+]Si8O22(OH)2, Microcline : KAlSi3O8

Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 8.5 cm x 4 cm x 1 cm

Blue nephrite consist of microfibrous Strontian (~3.5 % SrO) Potassicrichterite, divided from whitish porcelaneous Quartz-Microcline agregate by greenish layer of Potassic-magnesio-arfvedsonite. Such rock has trade name "dianite" in honour of Diana princess of Wales. Polished plate 8.5x4x1 cm. Collected by Olga A. Ageeva on Aleksandrovskii stream on Kedrovyi massif near famous Murun massif. Pavel M. Kartashov collection (#2108) and photo.

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Photo added: 30th Oct 2007