Mineral, Possibly Rock Fragment Containing A Mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Basalt with vesicles/amygdules

Basalt (containing volcanic glass and plagioclase)

Olivine/Peridot

Magnesium Iron Silicate (Mg,Fe)2SiO4

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture

Schist

Mica Schist (primarily Muscovite and Quartz)

Limestone

Calcium Carbonate (CaCO3)

Basalt (Vesicular)

Vesicular Basalt

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Coal (Bituminous or Anthracite)

Carbonaceous sedimentary rock (primarily Carbon, C)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Fossiliferous Limestone (Crinoidal)

Calcium Carbonate (CaCO3) - Limestone containing bioclasts

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Tumble Fragment)

Silicon Dioxide (SiO2)

Red Jasper (possibly Agatized Jasper)

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Petrified Wood

Silicified Wood (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Coal (likely Anthracite)

Anthracite coal

Ferruginous Sandstone (with Iron Oxide staining)

Clastic Sedimentary Rock - Quartz Arenite/Wacke

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Septarian Nodule

Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Sandstone (specifically Cross-bedded Sandstone)

Arenite (composed primarily of SiO2)

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Coarse-grained Granite

Phaneritic Granite (contains Quartz, Feldspar, and Mica)

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Shale (sub-type: Carbonaceous Shale)

Lutaceous Sedimentary Rock

Granitic Pegmatite (Muscovite and Quartz)

Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)

Brecciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Black Limestone with Calcite Veining

Bituminous Limestone (CaCO3 with Organic Carbon inclusions)

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Granite

Granitic intrusive igneous rock

Conglomerate

Polymictic Conglomerate

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Mica Schist

Mica Schist (primarily Muscovite and Quartz composition)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz Geode

Silicon Dioxide (SiO2)

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Petrified Wood

Silicified Wood (primarily SiO2)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone

Arenite (composed primarily of Quartz: SiO2)