"SWEETRealm:Rock"^^ . . "From Wikipedia: [A mineral] is different from a rock, which can be an aggregate of minerals or non-minerals and does not have a specific chemical composition. The exact definition of a mineral is under debate, especially with respect to the requirement a valid species be abiogenic, and to a lesser extent with regards to it having an ordered atomic structure."^^ . "Wikipedia:Rock"^^ . "Geonames:T.RKS"^^ . "FTT:145"^^ . . "TGN:21444"^^ . "ENVO"^^ . . "Geonames:T.RK"^^ . "rock"^^ . "FTT:1010"^^ . "A rock is a naturally occurring solid aggregate of one or more minerals or mineraloids."^^ . "EcoLexicon:rock"^^ . "ENVO:00001995"^^ .