Sedimentary And Metamorphic Minerals

Schist

Mica Schist

Quartzite with Iron Inclusions

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)

Slate

Slate (Foliated metamorphic rock consisting mainly of quartz and muscovite or illite)

Mica Schist

Mica Schist (primarily Muscovite or Biotite Schist)

Blue Quartzite (Blue Aventurine / Dumortierite Quartz)

Quartzite with inclusions (SiO2 with AlAl4BSi3O18)

Schist

Mica Schist

Clear Quartz

Silicon dioxide (SiO2)

Turquoise and Hematite

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Smoky Quartz

Silicon Dioxide (SiO2)

Green Quartz (including Prase or Aventurine variants)

Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)

Greenschist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Quartzite (with Iron Staining)

Metamorphosed Quartz Sandstone (SiO2)

Garnetiferous Quartzite (Garnet Gneiss Pebble)

Garnet-bearing Quartzite or Quartz-Feldspar Gneiss

Rhodochrosite in Quartz

Manganese Carbonate (MnCO3)

Yellow Aventurine

Silicon Dioxide (SiO2) with inclusion of Mica

Prase Quartz on Feldspar

Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Mica Schist

Schist (Crystalline metamorphic rock)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Green Quartzite

Quartzite (primarily SiO2 with trace impurities)

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz (Ferruginous variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Native Sulfur

Sulfur (S)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Pyrite (or Fool's Gold)

Pyrite (FeS₂)

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Schist (with Iron Oxide)

Mica Schist

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Marble

Recrystallized Calcite (CaCO3) Rock