Mineral, Often Found As A Rock (Metamorphic)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss

Howlite and Purple Amethyst Druzy

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Quartz/Amethyst)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Peridot (Olivine)

Olivine, (Mg,Fe)2SiO4

Pink Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (Quartz-Biotite-Muscovite Schist)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Rhodonite Tumbled Chips

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Unakite

Epidotized Granite

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Quartz (Iron-stained or Ferruginous)

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (SiO2 principal)

Milky Quartz

Silicon Dioxide (SiO2)

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Citrine

Silicon dioxide (SiO2)

Garnet (likely Almandine)

Almandine - Fe3Al2(SiO4)3

Black Marble

Recrystallized Calcite (CaCO3)

Bornite

Bornite (Cu5FeS4)

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO2)

Sandstone (likely Arkosic)

Arenite (SiO2 based)

Sandstone

Arenite (composed primarily of SiO2)

Garnet (likely Almandine)

Almandine Garnet, Fe3Al2(SiO4)3

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Diamond Drill Core (Greenschist and Quartzite)

Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)

Green Tiger's Eye

Silicified Crocidolite (Quartz variety, SiO2)

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3