What substance makes up the primary composition of the hard clam's thick, robust shell?

Answer

Calcium carbonate

The shell material that forms the protective armor of the hard clam is primarily composed of calcium carbonate, the same substance found in eggshells and rocks.

What substance makes up the primary composition of the hard clam's thick, robust shell?

#Videos

Quahog facts: the clams of clam chowder | Animal Fact Files

factBivalveshellfishclamQuahog