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Balbeer M.
's Polls
Science
The main constituents of pearls are
calcium oxide and ammonium chloride
0 votes (0%)
calcium oxide and ammonium chloride
calcium carbonate and magnesium carbonate
0 votes (0%)
calcium carbonate and magnesium carbonate
aragonite and conchiolin
0 votes (0%)
aragonite and conchiolin
ammonium sulphate and sodium carbonate
0 votes (0%)
ammonium sulphate and sodium carbonate
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