Really interesting answer from Draven616... that the Irish for black man is: fearr gorm (literally blue man)... I'm of half Irish & half Italian descent, and there is a common expression for the black people that sounds like Mulin-yon...
One theory is that Vitamin D toxicity can lead to calcium deposits appearing. Vitamin D toxicity is a condition that arises when too much vitamin D is consumed.
1 There is also a risk of contracting prostate cancer if there are high deposits in the bloodstream.  A person having high calcium in his body may also suffer from constipation, problems in digestion and dryness of mouth.