Glauconite (Greensand)
(K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂
sedimentary
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
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Chert (Flint Pepple)
Microcrystalline Quartz (SiO2)
sedimentary
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Green Tourmaline
Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Silica Pebble)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert Nodule
Microcrystalline Silica (SiO2)
sedimentary
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Rhodonite
Rhodonite (MnSiO3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Epidotized Granite)
metamorphic
Weathered garnet-bearing gneiss
Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Red Garnet Gemstone
Pyrope-Almandine Garnet (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz
Silicon dioxide (SiO2)
mineral
Chert
Silicon dioxide (SiO2)
Sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chert Fossil (Pebble)
Microcrystalline Quartz (SiO2) with biogenic inclusions
sedimentary
Greenstone
Protolith: Basaltic rock
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Quartz with iron staining
Silicon dioxide (SiO2)
mineral
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite with Pyrite Inclusions
Metamorphic Quartz-rich Rock
metamorphic
Magnetite
Magnetite (Fe3O4)
mineral
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Faceted Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Clear Quartz
Quartz (Silicon dioxide, SiO2)
mineral
Yellow Quartzite (Yellow Jasper)
Silicon Dioxide (SiO2)
metamorphic
Quartz (Common Quartz/Citrine-toned)
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Unakite (Epidote with Quartz and Feldspar)
Unakite (Metasomatized Granitic Rock)
metamorphic
Biotite Schist
Biotite Schist
Metamorphic
Quartzite Pebble (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
metamorphic
Pyrite (likely)
Pyrite, FeS₂
mineral