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.
When the body's chemical balance is off, calcium may be deposited in the brain, causing a disorder which can diagnosed via a x-ray, CAT scan, or MRI. The calcium that humans ingest is typically absorbed by the blood or used to strengthen bones and teeth. Brain calcification may occur in tumors in the brain.