Erayga "mispickel" waxa uu tilmaamayaa macdan, gaar ahaan macdanta arsenic iyo iron sulfide, oo leh qaacido kiimikaad ee FeSAs. Waxa kale oo loo yaqaan arsenopyrite, waxaana inta badan laga helaa xidhiidh la leh kaydka dahabka ah. Magaca "mispickel" waxa uu ka soo jeedaa ereyga Jarmalka "misspickel" oo macneheedu yahay "macdanta marin habaabinta," sababtoo ah waxaa mar loo maleynayay inay tahay macdanta qaaliga ah ee naxaasta ah laakiin markii dambe la ogaaday inay tahay isha hoose ee arsenic.