About: http://webisa.webdatacommons.org/311356061

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	Extracting the gemstones relies on the principle that gemstones has a greater specific gravity e.g. is heavier for given size than all other stones except diamonds.
http://www.w3.org/ns/prov#wasQuotedFrom	gemfossicking.com.au