About: http://webisa.webdatacommons.org/5518666

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	Double Refraction (Birefringence) - Calcite is a form of calcium carbonate, commonly referred to as Iceland spar, which has a rhombohedral crystalline shape.
http://www.w3.org/ns/prov#wasQuotedFrom	fsu.edu