Sedimentary And Metamorphic Minerals

Browse sedimentary and metamorphic minerals specimens identified by the Rock Identifier community.

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Metamorphic

Biotite Schist

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

metamorphic

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)

metamorphic

Gneiss (specifically Banded Gneiss)

Gneiss

metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic

Granite Gneiss

High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)

metamorphic

Mica Schist with Iron Staining

Muscovite/Biotite Schist

metamorphic

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

metamorphic

Biotite Mica

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

mineral

Gneiss

metamorphic

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

metamorphic

Pyrite

Iron Disulfide (FeS2)

mineral

Seraphinite (Clinochlore)

Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8

mineral

Gneiss

metamorphic

Gneiss

High-grade metamorphic rock (Gneiss)

metamorphic

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Mineral

Tiger Iron

Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)

metamorphic

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Combined Minerals / Metaphysical stones

Blue Kyanite

Kyanite (Al2SiO5)

mineral

Epidote with Magnetite/Hematite inclusions

Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides

mineral

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

metamorphic

Graphite

Graphite (Native Carbon, C)

metamorphic

Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)

Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)

mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral

Banded Gneiss

Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)

metamorphic

Gneiss (with Quartzite and Biotite)

Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)

metamorphic

Gneiss

Foliated Metamorphic Rock (Gneiss)

metamorphic

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Mineral