About: http://webisa.webdatacommons.org/58640206

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	Topaz has never been synthesized, but a number of imitations exist, including natural stones such as citrine and smoky quartz, and man-made imitations such as glass.
http://www.w3.org/ns/prov#wasQuotedFrom	palagems.com