About: http://webisa.webdatacommons.org/438366038

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	Any gemstone, including stones such as diamond, emerald, ruby, sapphire, amethyst, jade, opal or topaz and organic gemstones such as amber or pearl, whether cut or uncut and whether or not having an industrial use.
http://www.w3.org/ns/prov#wasQuotedFrom	legislation.gov.uk