Assertion: carbonate's form | /r/HasProperty | purest
Facets:
Source sentences:
text: In its purest form, calcium carbonate is derived from natural stone like marble, but it can also be processed to change unrefined calcium oxide into precipitated calcium carbonate (PCC).
text: In its purest form, calcium carbonate is derived from natural stone like marble, but it can also be processed to change unrefined calcium oxide into precipitated calcium carbonate (PCC).