About: http://webisa.webdatacommons.org/233478061

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	The sample is scratched by a standard mineral for the determination of Mohs' hardness each other, and the Mohs' hardness of the sample is determined by 0.1 unit by observing whether the sample is scratched or not.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com