About: http://webisa.webdatacommons.org/210310434

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	Although the term vein suggests this, the veins of quartz and other minerals are usually not thin tubes, but rather thin sheets.
http://www.w3.org/ns/prov#wasQuotedFrom	quartzpage.de