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General Science Elements Metals - Discussion Page For Q.1460 | General Knowledge Questions and Answers | General Knowledge Free Online-Tests | LucentBlackBoard | LucentBlackBoard.com
Q: The main constituents of pearls are
A. calcium oxide and ammonium chloride B. calcium carbonate and magnesium carbonate
C. aragonite and conchiolin D. ammonium sulphate and sodium carbonate

Answer and Explanation

Answer:calcium carbonate and magnesium carbonate

Explanation:
There is no explanation...

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