Crystal System: Orthorhombic
Status of Occurrence: Unconfirmed Occurrence
Chemical Composition: Iron antimony sulphide
Chemical Formula: FeSb2S4
Method(s) of Verification: none
Introduction: berthierite tends to occur in low-temperature hydrothermal vein associations along with other antimony-bearing species such as stibnite and jamesonite.
Occurrence in Wales: berthierite is one of a number of minerals that were reported from the Dolgellau Gold-belt by Readwin (1888) and have not been observed since. This record therefore requires confirmation.
There are no key localities for this specimen.
- Readwin, T.A., 1888. Gold in Wales. London, 12pp.