About: http://webisa.webdatacommons.org/239366177

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	One of the popular metal tests involves filing a notch in the piece and using acid to test the metal and some will want to scratch the stone, especially stones other than diamonds.
http://www.w3.org/ns/prov#wasQuotedFrom	pricescope.com