About: http://webisa.webdatacommons.org/75238442

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 ball lens is preferably constructed of sapphire or quartz or other materials that are both acid resistant and transparent to the incident and scattered light wavelengths.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com