Assertion: coral | /r/MadeOf | calcium carbonate
Facets:
value: like all organic gemstones
type: OTHER
Source sentences:
text: Red Coral is made of CALCIUM CARBONATE and its chemical composition is CaCO3 i.e calcium carbonate
text: Red coral is made of calcium carbonate and, like all organic gemstones, is quite a soft stone (3 to 4 Mohs).