What causes the white marks which sometimes appear on our finger nails?

What causes the white marks which sometimes appear on our finger nails?These are caused by calcium collecting under the nails.

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Uttarakhand Foundation Day: History, Celebration

Uttarakhand Foundation Day: History, Celebration

Uttarakhand Foundation Day: Uttarakhand is famous as the “Land of the Gods” or “Dev Bhumi”. …