About: http://webisa.webdatacommons.org/286340197

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	He also covers using Opal Cure, a method he invented to seal cracks in opal and all stones including agates using a simple technique.
http://www.w3.org/ns/prov#wasQuotedFrom	lapidaryschool.org