IFP: 30ish Most Common Rocks: Easily Confused Set #3
IFP: 30ish Most Common Rocks: Easily Confused Set #3
Completion requirements
Mica Schist, Anthracite, Garnet Schist, Gneiss, Marble, Phyllite, Quartzite, Slate, Bituminous Coal, Chlorite Schist, Amphibolite, Serpentinite, Diorite, Gabbro, Pegmatite, Granite, Shale, Conglomerate, Breccia
Grading method: Highest grade