Offretite from Mont Semiol, France
Micro specimen of Offretite from its type locality, Mont Semiol, France.
£3.50
Offretite from Mont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France
Micro specimen of Offretite from its type locality, Mont Semiol, France.
Blue-grey mineral is possibly Montmorillonite, but hasn't been analysed.
Comes boxed with our ID label and a former owners label.
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