Sedimentary And Metamorphic Minerals

Mica Schist

Mica Schist (Muscovite subclass)

Mica Schist

Mica Schist (Quartz-Mica Schist)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Garnet-bearing Schist / Conglomerate Specimen

Metamorphic rock with almandine garnet porphyroblasts

Schist

Mica Schist

Polished banded gneiss pebble

Gneiss, chiefly quartz–feldspar–mica; exact mineralogy uncertain from image

Magnetite or Magnetic Iron Ore

Magnetite (Fe3O4)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Marble (Egg Carving)

Metamorphosed Limestone (predominantly CaCO3)

Mica-rich metamorphic rock fragments

Biotite schist / mica schist (predominantly biotite, muscovite, and quartz)

Mica Schist

Mica Schist

Banded metamorphic rock, likely banded gneiss

Gneiss, probably biotite–quartz–feldspar gneiss

Slate and shale outcrop

Slate: very low-grade metamorphosed shale, chiefly clay minerals, muscovite/illite, and quartz; associated shale may be present.

Iron-stained Quartzite / Chert

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Marble

Metamorphosed Limestone (CaCO3)

Schist

Mica Schist

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss

Banded Gneiss

Gneiss

White Marble

Recrystallized Calcite (CaCO3)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Clear Quartz

SiO2 (Silicon Dioxide)

Dark weathered metamorphic rock, likely schist or phyllite

Undetermined; probably mica-rich quartz–feldspar schist/phyllite

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Gneiss (specifically Epidote-Quartz Gneiss)

Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)

Mica-rich schist (probable)

Mica schist, composed mainly of mica minerals with quartz and possibly feldspar

Garnet-bearing Schist

Almandine Garnet [Fe3Al2(SiO4)3] in Micaceous Schist

Muscovite Schist

Muscovite (KAl2(AlSi3O10)(OH)2) in Schist

Gneiss

Gneiss

Black Slate

Slate (Metamorphic Rock)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz pebble / Quartzite

Silicon Dioxide (SiO2)

Quartz (Raw / Unpolished)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)