Introduction: alloys of gold and silver with minor to moderate levels of platinoids occur locally in various hypogene gold deposits and in placers. However, as a general comment the platinoid metals are rare in most gold deposits and the converse is also the case in that gold tends to be only a very minor component of classic platinoid deposits (Boyle, 1979).

Occurrence in Wales: despite various claims relating to occurrences of native platinum and other PGM's in the Dolgellau Gold-belt, dating back to the 19th Century (e.g. Readwin, 1888), no subsequent discoveries have been made, as noted in the sections of this site concerning those native elements. However the presence of small amounts of this platinum-bearing alloy in a single grain of alluvial gold from the area was determined analytically in 2001 during research studies at the National Museum of Wales.

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