Sedimentary Or Metamorphic

Blue Calcite

Calcium Carbonate (CaCO3)

Botryoidal Pyrite

Iron Sulfide (FeS2)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Greenschist

Chlorite schist

Garnet Schist

Almandine-Mica Schist

Greenschist

Chlorite schist

Mica Schist

Mica Schist (Silicate rock)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Biotite Schist

Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Mica Schist

Mica Schist (predominantly Muscovite/Biotite Schist)

Likely weathered metamorphic rock (quartzite or schist)

Quartz-rich foliated metamorphic rock; exact identification requires testing

Shale (possibly Carbonaceous or Oil Shale)

Argillaceous Sedimentary Rock

Magnetite (Lodestone)

Magnetite (Fe3O4)

Graphite

Graphite (Native Carbon), Formula: C

Graphite

Graphite (Carbon, C)

Quartzite Cobble

Metamorphic Quartzite (SiO2)

Banded gneiss (likely amphibolite-bearing gneiss)

Gneiss; quartz–feldspar–mica/amphibole aggregate

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Garnet

Garnet (X3Y2(SiO4)3)

Gneiss

Gneiss (Metamorphic Rock)

Slate

Slate (Metamorphic Rock)

Gneiss

Foliated Metamorphic Rock

Gneiss

Gneissic Metamorphic Rock

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Pyrite

Iron Sulfide (FeS2)

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pink Feldspar

Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8