Assertion: aragonite | /r/HasProperty | a kind of calcium carbonate
Facets:
Source sentences:
text: Aragonite is a kind of calcium carbonate found in many mollusks.
text: Epithelial cells in the mantle secrete proteins, called conchiolin, and polysaccharides that form a special matrix that provide the perfect environment for crystals of aragonite, a type of calcium carbonate, to form.