Metamorphic Or Sedimentary (With Staining)

Garnet (likely Almandine)

Almandine Garnet, Fe3Al2(SiO4)3

Kyanite in Quartz

Al2SiO5 in SiO2

Mica Schist (Garnetiferous)

Garnet-Mica Schist

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Quartzite (Yellow/Orange variety)

Quartzite (primarily SiO2)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Gneiss

Gneiss

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Gneiss

Gneiss (High-grade Metamorphic Rock)

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

Gneiss (Banded Gneiss)

Gneiss

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Magnetite

Magnetite (Fe3O4)

Garnet Schist or Garnet-bearing Quartzite

Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

Anthracite Coal

Anthracite (Carbon-based sedimentary-derived metamorphic rock)

Calcite

Calcium Carbonate (CaCO3)

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2

Jasper (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Galena

Lead Sulfide (PbS)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)