Sedimentary And Metamorphic Minerals

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

Banded Gneiss

Gneiss

Epidote

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

Painted River Rock

Artificially Coated Sedimentary Rock

Gneiss (Metamorphic Rock)

Gneiss

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Quartz

Silicon Dioxide (SiO2)

Golden Calcite

Calcium Carbonate (CaCO3)

Magnetite / Ironstone Pebble

Magnetite (Fe3O4)

Blue Calcite

Calcium Carbonate (CaCO3)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous quartz–feldspar metamorphic rock; exact mineralogy requires testing

Gneiss

Gneiss

Gneiss

Gneiss

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Slate

Slate (Metamorphic rock)

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Shungite

Non-crystalline carbon (allotrope of carbon)

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Marble

Recrystallized Calcite (CaCO3)

Marble

Recrystallized Calcite (CaCO3) / Marble

Gneiss

Gneiss (High-grade regional metamorphic rock)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Magnetite

Magnetite (Fe3O4)

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)