About: http://webisa.webdatacommons.org/328171653

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	Crystals and other stones will hold up longer but selenite is inexpensive and works best, I think they could eventually wear down a bit, but I would think it would take many years.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com