Mineral (Refined Metal)

Smoky Quartz and Biotite Schist

Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)

Mica Schist

Mica Schist (Intermediate-grade Metamorphic Rock)

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Chondrite Meteorite Fragment

Ordinary Chondrite (L or H type)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Schist

Mica Schist

Schist

Mica Schist

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Gold-Bearing Quartz

Auriferous Quartz (SiO2 with native Au)

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Pink Fluorite

Fluorite (Calcium Fluoride) - CaF2

Green Aventurine

Quartz variety (SiO2 with inclusions)

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Labradorite

Labradorite ((Ca,Na)(Al,Si)4O8)

Ferruginous Quartz (Hematoid Quartz)

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Labradorite

Feldspar (Plagioclase Series), (Ca,Na)(Al,Si)4O8

Ironstone Concretion (Limonite/Goethite)

Ironstone (primarily FeO(OH)·nH2O)

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Sandy Ironstone

Ferruginous Sandstone

Schist

Mica Schist

Schist

Lepidoblastic Mica Schist

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Ironstone Concretion / Goethite Nodules

Ironstone (composed primarily of Goethite FeO(OH) and Limonite)

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Schist (Biotite Schist)

Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Schist

Mica Schist

Limonite after Pyrite (Prophecy Stone)

Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)

Basalt River Stone

Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Vesicular Basalt (Scoria)

Vesicular Basalt

Nuummite

Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)

Ironstone Concretion (Limonite/Goethite)

Goethite-rich Concretion (FeO(OH))

Mica Schist

Mica Schist (Complex Silicate Rock)

Muscovite Schist

Mica Schist (primarily KAl2(AlSi3O10)(OH)2)

Schist

Mica Schist

Sandstone with Ironstone Concretion

Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))

Basalt with Granite Inclusions (Xenoliths)

Mafic igneous rock (Basalt) with Sialic minerals

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Pyrite with Iron Oxides (Fool's Gold in Matrix)

Iron Sulfide (FeS2)