About: http://webisa.webdatacommons.org/271077208

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	Sand grains are mostly quartz and quartz is a primary ingredient in most stones.Lightning Stones ---(called Giraffe rocks by Maria and Tess Rucoba)Clay cemented into an iron mineral called siderite.
http://www.w3.org/ns/prov#wasQuotedFrom	lakemichiganrocks.com