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.
Scarcity of Vitamin K or magnesium in your diet may end up with a calcium problem. Calcium deposits in the subcutaneous and periarticular (surrounding a joint) tissues do not occur due to excess dietary calcium.