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Redgillite from
Frongoch Mine (Bron-y-Goch Mine; Llawynwnwch Mine), Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion (Dyfed; Cardiganshire), Wales, UK


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Frongoch Mine (Bron-y-Goch Mine; Llawynwnwch Mine), Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion (Dyfed; Cardiganshire), Wales, UK
© Steve Rust
Description
Comments:Micro crystal (to 0.25mm)drusey coverings in areas to 1cm.Some redgillite from Frongoch mine has a high Zn content, along with most othere redgillite from mid-Wales.
Habit:Lath-like, prismatic
Colour:Emerald Green to nickle green
UV Fluorescence:None
Quality of samples:Good crystals or rich for species - important (!)
Rarity at site:Very Rare
Confirmation
Validity:Believed Valid
References
References:UKJMM 17 unknown F2; Pluth, J. J., Steele, I. M., Kampf, A. R. & Green, D. I. (2005): Redgillite, Cu6(OH)10(SO4)•H2O, a new mineral from Caldbeck Fells, Cumbria, England: description and crystal structure. Mineralogical Magazine, 69, 973-980.
Associated minerals:
Associates:Caledonite
Covellite
Cuprite
Hydrocerussite
Langite
Quartz
Schulenbergite
Susannite
Wroewolfeite
Data
Mineral Data:Click here to view Redgillite data
Locality Data:Click here to view Frongoch Mine (Bron-y-Goch Mine; Llawynwnwch Mine), Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion (Dyfed; Cardiganshire), Wales, UK
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