About: http://webisa.webdatacommons.org/316328892

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	Man-made materials, such as glass and synthetic spinel, have been used to imitate many different gems, but natural stones can also be modified to resemble more valuable gem.
http://www.w3.org/ns/prov#wasQuotedFrom	valuablestones.com