Assertion: natural calcite | /r/HasProperty | pure caco
Facets:
value: essentially
type: DEGREE
Source sentences:
text: Some natural calcites are essentially pure CaCO 3 ; others contain noteworthy percentages of other cations (e.g., Mg, Mn, Fe, boron [B], bromine [Br], Sr, and/or Y), substituting for some of their calcium.