Image credit: James St. John
CaCO3
fossiliferous limestone coquina oolite travertine
limestone breccia micrite chalk
(Ca,Mg)(CO3)2 dolostone
Fe2O3 ironstone
conglomerate breccia sandstone shale
Flickr Image gallery, James St. John: bituminous coal
Mindat.org image gallery: bituminous coal
Google images: bituminous coal
Mindat.org: About bituminous coal
Sandatlas: bituminous coal
Bituminous coal in Minerals Education Coalition
Indiana Center for Coal Technology Research: coal characteristics