| Mineral: | Potassicrichterite: (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2
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| Comments: | Lapidary sample of 'Dianite' consisting of blue nepherite with fiberous strontian (~3.5 % SrO) potassicrichterite. White nodule is quartz-microcline surrounded by dark green potassic-magnesio-arfvedsonite. |
| Location: | Kedrovyi alkaline Massif, Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. |
| Scale: | Specimen Size 8.5x4x1 cm. |
| Copyright: | © Pavel M. Kartashov |
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