Although interior decorating students are taught first off the mantra, "
Pink and Green should never be seen", some tints of
red do look
good with some off-shades of green, at least in photographs (we aren't doing houses or offices). And once I deliberately put pale cyan (of all icky hues) behind an As, to show the hole through it emphatically.
But more
ad rem: what if (as seems very likely on Robert's coin) the coins that broke incorporated major impurities that caused structural weakness, so that stepping on them or even dropping them could make them break?
Pat L.