- Supergene: in situ natural oxidation & weathering deposits
- Anglesey: a specimen of stibnite in the mineral collection of the National Museum of Wales (NMW 27.111.GR.283), reputedly collected from the coast between Rhôs-mynach Mine and Dulas, on Anglesey has a cherry-red surface coating, that may well be kermesite, but verification has not been made. Further to this, the validity of the provenance of this specimen is questionable as no other antimony-bearing minerals are known from this part of Anglesey (Bevins, 1994).
- Bwlch Mine, Deganwy, Gwynedd: cherry-red coatings on stibnite have been suggested as kermesite, but have never been verified (Bevins, 1994).
There are no key localities for this specimen.
- Bevins, R.E., 1994. A Mineralogy of Wales National Museum of Wales, Geological Series No. 16, Cardiff, 146pp.
- Bevins, R.E., Alderton, D.H.M. & Horak, J.M., 1988. Lead-antimony mineralisation at Bwlch Mine, Deganwy, Wales. Mineralogical Magazine, 52, 391-394.
There are no references for this specimen.