Sedimentary And Metamorphic Minerals

Gneiss

Gneiss

Quartz pebble

SiO2

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

Quartz

Silicon Dioxide (SiO2)

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (SiO2)

Quartz River Rock

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite Gneiss

Granitic Gneiss

Banded gneiss

Orthogneiss or paragneiss, chiefly quartz–feldspar–mica

Gneiss

Gneiss (High-grade Metamorphic Rock)

Chrysocolla on Matrix

Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)

Milky Quartz

Silicon Dioxide (SiO2)

Graphite

Graphite (C)

Quartz-Veined Slate or Greenstone

Metamorphic rock with quartz vein (SiO2)

Quartz

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Dark gray metamorphic rock fragment

Likely slate or fine-grained schist; mineral composition cannot be confirmed from the image

Gneiss

Gneiss

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz with Matrix

Silicon Dioxide (SiO2)

Magnetite / Hematite (Iron Ore)

Magnetite (Fe3O4) or Hematite (Fe2O3)

Polished Hematite Tower

Hematite (Fe2O3)

Quartz

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky Quartz)

Quartz (Silicon Dioxide, SiO2)

Gneiss (Banded Gneiss)

Gneiss

Quartz

Silicon Dioxide (SiO2)

Kaolinite (Kaolin)

Kaolinite (Al2Si2O5(OH)4)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Gneiss

Gneiss

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

White Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)