About: http://webisa.webdatacommons.org/368045084

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	The crystal is a form of calcite, known for its property of diffracting light into two separate rays.
http://www.w3.org/ns/prov#wasQuotedFrom	historythruherstory.com