Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Green Jasper

Silicon Dioxide (SiO2) with impurities

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Orange Calcite

Calcium Carbonate (CaCO3)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2 with iron oxide inclusions)

Fossilized Wood (with Coal and Limonite)

Petrified Wood (Silicified or Carbonized Flora)

Calcite Geode

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

White Agate (resembling Bone Chalcedony)

Cryptocrystalline Quartz (SiO2)

Polygenetic Breccia

Clastic Breccia (containing lithic fragments in a fine-grained matrix)

Agate (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (Druzy or Geode fragment)

Silicon Dioxide (SiO2)

Amygdaloidal Rhyolite (often called Lake Superior Agate relative)

Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Schist

Mica Schist (Group of medium-grade metamorphic rocks)

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Red Quartzite

Quartzite (primarily SiO2 with trace Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Granite or Pegmatite with Mica

Granitoid

Quartzite

Quartzite (primarily SiO2)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Quartzite

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Quartzite

Quartzite (SiO2)

Granite Cobble

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Quartz Geode

Silicon Dioxide (SiO2)

Fluorite (Rainbow Fluorite Point)

Calcium Fluoride (CaF2)

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

Green Fluorite

Fluorite (Calcium Fluoride) - CaF2

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

Quartzite

Quartzite (primarily SiO2)

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Gold-bearing Quartz with Pyrite

Quartz (SiO2) with Gold (Au) and Pyrite (FeS2)

Puddingstone

Conglomerate (Indurated)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock