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Tvedalite, Chiavennite, Analcime


Tvedalite : (Ca,Mn)4Be3Si6O17(OH)4·3H2O, Chiavennite : CaMnBe2Si5O13(OH)2·2H2O, Analcime : Na2[Al2Si4O12] · 2H2O

Photo Copyright © OT. Ljostad  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Blue Pearl (Saga Pearl) quarry, Tvedalen, Larvik, Vestfold, Norway
Gray, massive tvedalite covered by light brown chiavennite on analcime crystals. Field of view about 4 mm. The specimen was collected by Alf Olav Larsen, and it is now in the micromount collection of OT. Ljostad.

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