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Cristaux tabulaires de belle taille de célestine bleu pâle, partialement recouverts par hématite
Localité : Mine Hammam-Zriba, Zriba-Village, Zaghouan, Tunisie
Dimensions : 12,5 x 9,4 x 7,8 cm. Environ
Poids : 975 grammes
Blocky, pale blue celestine crystals with iron oxide coating. Hamman Zriba mine, Tunisia. Specimen is 13 cm across. One of many specimens obtained in the 1990s from a giant walk-in vug.
These were initially mis-identified as barite. An XRF analysis on a typical specimen found it to be fairly pure SrSO4, with only about 2.1 % BaO, and 0.1 % CaO.
Collezione : Curiosités minérales