Sedimentary And Metamorphic

Agate

Silicon Dioxide (Chalcedony), SiO2

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Pyrite

Iron Pyrite (FeS₂)

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Slate

Slate (Metamorphic rock)

River Pebble (Quartzite)

Quartzite (SiO2)

Quartz (Clear/Milky)

Silicon Dioxide (SiO2)

Mica Schist

Metamorphic Rock (Schistose)

Pyrite

Iron Sulfide (FeS2)

Brown Marble

Metamorphic Limestone (CaCO3)

Likely weathered metamorphic rock (quartzite or schist)

Quartz-rich foliated metamorphic rock; exact identification requires testing

Gneiss

Feldspar–quartz–mica gneiss, locally amphibole-bearing

River Cobble (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneissic/Schistose)

Banded Gneiss

Gneiss (SiO2 enriched metamorphic rock)

Mica Schist

Schist (biotite/muscovite schist)

Slate

Foliated Metamorphic Rock

Quartzite Pebble

Metamorphic Quartz (SiO2)

Mica Schist

Mica Schist (Quartz-Mica Schist)

Sandstone pebble

Sandstone (arenite / quartzarenite)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Green Kyanite

Kyanite (Al2SiO5)

Magnetite with Quartz

Magnetite (Fe3O4)

Quartz-Veined Slate or Greenstone

Metamorphic rock with quartz vein (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (SiO2)

Pyrite in Matrix

Iron Sulfide (FeS2)

Quartz River Rock

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz Mineral

Silicon Dioxide (SiO2)

Feldspar

Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)

Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)