Schist
Mica Schist (variety: Muscovite/Biotite Schist)
metamorphic
Category
Mineral Like (Anthropogenic)
Browse mineral like (anthropogenic) specimens identified by the Rock Identifier community.
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River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions of Chlorite, Manganese, or Iron
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Brimstone (Native Sulfur)
Native Sulfur (S)
mineral
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Quartz Vein / Quartz Matrix
Silicon Dioxide (SiO2)
mineral
Schist
Schist (Crystalline metamorphic rock)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite inclusions
sedimentary
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Common Opal (Potch)
Hydrated Silica (SiO2·nH2O)
mineral
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)
Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Chert (Banded)
Cryptocrystalline Silica (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Botryoidal Chalcedony (likely Desert Rose/Agatized Geode Crust)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Veined Sandstone with Calcite Veins
Sedimentary sandstone with hydrothermal/mineral veins
sedimentary
Bauxite
Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))
sedimentary
Basalt with Vesicular Amygdule
Extrusive igneous rock (Mafic)
igneous
Galena
Lead Sulfide (PbS)
mineral
Granitic Pegmatite with Graphic Texture
Graphic Granite (alkali feldspar and quartz intergrowth)
igneous
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Druzy Chalcedony/Quartz on Fluorite core
Silicon Dioxide (SiO2) on Calcium Fluoride (CaF2)
mineral
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral