Mineral, Possibly Rock Fragment Containing A Mineral

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 based with various mineral cements)

Sandstone (likely with Quartz Veining)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Red Scoria (Lava Rock)

Vesicular Basalt / Scoria

Amygdaloidal Basalt

Amygdaloidal Basalt (containing secondary minerals like Quartz, Zeolites, or Calcite)

Limestone Breccia

Sedimentary Breccia (Calcareous)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chondrite Meteorite

Ordinary Chondrite (L or H Type)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amber

Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.

Granular Sandstone

Arenite (variable composition, primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Basalt

Mafic volcanic rock (primarily Plagioclase and Pyroxene)

Pyrite on Quartz matrix

Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)

Sandstone Cobble

Clastic Sedimentary (Sandstone)

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Schist

Mica Schist (Group of medium-grade metamorphic rocks)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Pyrite

Iron Sulfide (FeS2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Sandstone (likely Siltstone or fine-grained Sandstone)

Sedimentary Rock (Clastic)

Sandstone

Arenite (SiO2 primarily)

Quartz (Granular Milky Quartz fragment)

Silicon Dioxide (SiO2)

Granite Pegmatite

Coarse-grained Granite (SiO2 - Aluminum and Alkalies)

Amygdaloidal Basalt with Quartz/Zeolite Infill

Amygdaloidal Basalt (extrusive volcanic rock with SiO2 or CaAl2Si3O10·3H2O infill)

Arkosic Sandstone (or Conglomeritic Sandstone fragment)

Arkose (rich in feldspar)

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Quartz (Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)