Sedimentary Or Metamorphic (Base Substrate)

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Emerald

Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rhodochrosite

Manganese carbonate (MnCO3)

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz (Carved Merkaba)

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Quartz (Milk Quartz / Massive Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Crystal Variety)

Silicon Dioxide (SiO2)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Rough Precious Opal

Hydrated Silica (SiO2·nH2O)

River Rocks and Pebbles

Mixed Silica-rich Sediments (SiO2 based)

Gneiss (Metamorphic Rock)

Gneiss

Ferruginous Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Chert (Flint)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

White Marble

Metamorphosed Limestone (principally CaCO3)

Beryl (Variety Mix)

Be3Al2(Si6O18)

Garnet in Schist (Polished Tower)

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Quartz (Grain)

Silicon Dioxide (SiO2)

Quartz (Milky/Sugar variety)

Silicon Dioxide (SiO2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Pyrite in Quartz

Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Crystal Point

Silicon Dioxide (SiO2)