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. The main constituents of pearl are
(a) Calcium carbonate and magnesium carbonate
(b) Aragonite and conchiolin
(c) Ammonium sulphate and sodium chloride
(d) Calcium oxide and ammonium chloride
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Answer Posted / sabita kumari
Typically the build-up of a natural pearl consists of a
brown central zone formed by columnar calcium carbonate
caco3,About 95% of nacre consist of layers of calcium
carbonate (CaCO3)
the answer is calcium carbote and magnesium cabonate
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