About: http://webisa.webdatacommons.org/332738075

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	Fluorite is a naturally occurring crystal that has three special properties that make it eminently suitable for use in lenses ??? it transmits infrared and ultraviolet light well, has a very low refractive index and low dispersion.
http://www.w3.org/ns/prov#wasQuotedFrom	canon-europe.com