About: http://webisa.webdatacommons.org/9512137

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In calcite (and presumably aragonite), some of the cations (Ca+) can be replaced by others, including magnesium, iron, manganese, zinc and others.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com