- Supergene: post-mining oxidation & weathering deposits
- Dolaucothi Gold Mine, Pumpsaint, Carmarthenshire: scorodite occurs rarely as thin greenish-grey coatings on part-weathered arsenopyrite (J.S. Mason, unpublished data).
- Dolgellau Gold-belt, Gwynedd: first recorded by Gilbey (1968) from numerous mines in the area, scorodite is widespread in trace to minor amounts, and shadows arsenopyrite in its distribution. It has been found at Clogau, Vigra, Cefn Coch, Tyddyn Gwladys and Prince Edward mines (Gilbey, 1968; Bevins & Mason, 1998) and in pyrite-arsenopyrite bearing boulders in the bed of the Afon Wen (J.S. Mason, unpublished data). It is perhaps best developed in the Foel Ispri mines, near Llanelltyd, where sub-millimetre thickness greenish-yellow crusts fill small cavities in pyrite-arsenopyrite rich veinstone.
- Gwaith-yr-Afon Mine, Goginan, Ceredigion: greyish to pale yellow sparsely scattered crystal aggregates (up to 0.75 mm) associated with limonite and pharmacosiderite on quartz, have been identified visually as scorodite (Mason & Rust, 1995).
- Snowdon, Gwynedd: as in the Dolgellau Gold-belt, scorodite shadows arsenopyrite in its occurrence and is thus present at mines around the caldera margin, such as Cwm Bychan, near Beddgelert; Llanberis; Moel Fleiddiau, near Blaenau Ffestiniog and Ceunant and Tan-y-garth mines near Bethesda: at the latter site it is particularly common (Bevins & Mason, 1998). Typically it forms thin microcrystalline crusts in association with iron oxides on decomposing arsenopyrite.
- Bevins, R.E. & Mason, J.S., 1998. Welsh Metallophyte and metallogenic evaluation project: Results of a Minesite Survey of Gwynedd. National Museums of Wales, Cardiff.
- Gilbey, J.W., 1968. The mineralogy, paragenesis and structure of the ores of the Dolgellau Gold Belt, Merionethshire, and associated wall rock alteration. Unpublished Ph.D thesis, University of London, UK.
- Rust, S.A. & Mason, J.S., 1994. An unusual occurrence of arsenate minerals at Gwaith-yr-Afon mine, Dyfed, Wales. Journal of the Russell Society, 5(2), 109-113.