Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Category
Sedimentary Or Mineral
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Likely mica schist
Mica-rich schist, probably muscovite–biotite schist
metamorphic
Unidentified light-colored rock or mineral specimen
Indeterminate; possibly weathered calcite-rich material, limestone, or pale quartz-bearing rock
mineral
Quartz Vein in Matrix (Breccia / Host Rock with Quartz)
Silicon Dioxide (SiO2) in Host Rock Matrix
metamorphic
Beach Pebble (Quartzite / Sandstone)
Quartz-rich sedimentary or metamorphic rock pebble
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
sedimentary
Biotite-bearing metamorphic rock, likely schist
Mica schist; chiefly quartz, feldspar, and biotite mica
metamorphic
Banded Sandstone or Quartzite Pebble
SiO2 (dominant) with impurities
sedimentary or metamorphic
Likely raw mica-bearing metamorphic rock or mineral fragment
Tentatively biotite schist; visually similar dark mica-rich material
metamorphic
Sandstone with Quartz Vein
Quartz-veined Arenite (SiO2 in detrital quartz matrix)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Shale
Clastic Sedimentary Rock
sedimentary
Sandstone Pebble
Arenite (predominantly SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss
metamorphic
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Tumbled jasper (likely picture/brecciated jasper)
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
mineral
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite or Arkose)
sedimentary
Sandstone
Sedimentary Rock
sedimentary
Tumbled banded gneiss
Gneiss, a foliated metamorphic rock; exact mineral composition cannot be determined from the image
metamorphic
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite gneiss
metamorphic
Banded gneiss
Gneiss, a foliated metamorphic rock; likely quartz–feldspar–mica gneiss
metamorphic
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Fossil-bearing rock, possibly with a fossilized shell or coralline specimen
Indeterminate fossil in sedimentary matrix; precise identification is not possible from the image
fossil
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Biotite-rich gneiss with a dark mafic band
Banded gneiss, likely quartz–feldspar–biotite gneiss (exact minerals uncertain from the image)
metamorphic
Quartz
Silicon dioxide (SiO2)
mineral
Limonite
FeO(OH)•nH2O
mineral
Sandstone
Sedimentary Rock
sedimentary
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Galena
Lead Sulfide (PbS)
mineral
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Banded Sedimentary Rock
Sedimentary Rock with Quartz/Feldspar Vein
sedimentary