Mineral, Often Found As A Rock (Metamorphic)

Charoite

Charoite (Hydrated potassium, sodium, calcium, barium, strontium silicate hydroxide fluoride)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Amygdaloidal Basalt

Amygdaloidal Basalt

Quartz Geode (with possible Manganese or Goethite coating)

Silicon Dioxide (SiO2)

Druzy Quartz on Chert/Siltstone

Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Limonite (Iron Stone)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Grey Agate

Silicon Dioxide (SiO2) - variety: Agate/Chalcedony

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Sandstone (Pebble)

Arenite (primarily SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

Druzy Quartz (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Greywacke (likely)

Greywacke (a type of sandstone)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Phyllite

Phyllite (Foliated metamorphic rock)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Sandstone

Arenite (predominantly SiO2)

Banded Gneiss (River Cobble)

Gneiss (High-grade regional metamorphic rock)

Sandstone

Arenite (SiO2 based)

Sandstone (with banding)

Arenite (primarily SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Citrine Quartz

Silicon Dioxide (SiO2)

Red Garnet

Almandine Garnet (Fe3Al2(SiO4)3)

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Gold Nugget

Native Gold (Au)

Smoky Quartz (with possible Feldspar inclusions)

Silicon Dioxide (SiO2)

Lapis Lazuli

Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Chrysoberyl (Cyclic Twin)

Beryllium Aluminum Oxide (BeAl2O4)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Sandstone

Arenite (SiO2 based)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-bearing Ore (likely Gold-bearing Quartz)

Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)