Assertion: skeletal system | /r/HasProperty | calcite
Facets:
Source sentences:
text: The skeleton of the echinoderms, which include, among other things, the starfish, is composed of calcite and a small amount of magnesium oxide.
text: The skeleton of the echinoderms, which include, among other things, the starfish, is composed of calcite and a small amount of magnesium oxide.