About: http://webisa.webdatacommons.org/260848443

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	Agate is a sedimentary silica-rich rock composed of the mineral chalcedony, which is a term generally referring to the fibrous growth of quartz; as well as more common forms of quartz.
http://www.w3.org/ns/prov#wasQuotedFrom	yuprocks.com