Metal (Elemental Mineral)

Basalt with Calcite Veins

Basalt (containing CaCO3 inclusions)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite)

Rutilated Quartz

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

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

Green Aventurine

Quartz variety (SiO2 with inclusions)

Pink Fluorite

Fluorite (Calcium Fluoride) - CaF2

Ferruginous Quartz (Hematoid Quartz)

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Labradorite

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

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Labradorite

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

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Schist

Mica Schist

Schist

Mica Schist

Ironstone Concretion (Limonite/Goethite)

Ironstone (primarily FeO(OH)·nH2O)

Mica Schist

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

Sandy Ironstone

Ferruginous Sandstone

Schist

Mica Schist

Schist

Lepidoblastic Mica Schist

Basalt

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

Ironstone Concretion / Goethite Nodules

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

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

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)

Sulfur on Aragonite

Sulfur (S) and Aragonite (CaCO3)

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)

Sandstone with Ironstone Concretion

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

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Schist

Mica Schist

Muscovite Schist

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

Basalt with Granite Inclusions (Xenoliths)

Mafic igneous rock (Basalt) with Sialic minerals

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

Iron Sulfide (FeS2)

Basalt

Extrusive mafic igneous rock

Basalt (River Cobble)

Mafic Igneous Basalt (composed primarily of Plagioclase feldspar, Pyroxene, and Olivine)