About: http://webisa.webdatacommons.org/417992287

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	After heavy machinery such as bulldozers and excavators are used to open the pits and dig out the mineral bearing soil, hydraulic sluices and seives are used to do all the sorting.
http://www.w3.org/ns/prov#wasQuotedFrom	internetstones.com