<http://webisa.webdatacommons.org/prov/161559042>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/181589418> .
<http://webisa.webdatacommons.org/181589418>	<http://www.w3.org/ns/prov#value>	"Others factors such as color or luster may be enhanced by irradiation or a quick acid dip, etc. but to use the e word for removal of matrix seems to me to be a bit off base." .
<http://webisa.webdatacommons.org/181589418>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/181589418>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<mindat.org> .