Assertion: giant clam's shell | /r/MadeOf | calcium carbonate
Facets:
Source sentences:
text: The shell is made of calcium carbonate and is secreted by the mantle (soft body wall).
text: The bivalve animal is a rare creature that spends its life inside an elephant tusk-like hard shell made of calcium carbonate.
text: Shells are made of calcium carbonate—CaCO 3 , one atom of calcium, one carbon, three oxygen—and clams build different amounts of the isotopes oxygen-16 and oxygen-18 into their homes depending on water temperature, evaporation rates and other conditions.
text: The shell is made of calcium carbonate and is secreted by the mantle (soft body wall).