Red Siltstone
Siltstone (composed mainly of SiO2 and Fe2O3)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)
metamorphic
Siltstone
Siltstone (primarily composed of microcrystalline Quartz and Feldspar)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
sedimentary
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Basalt-Amugydule (Amygdaloidal Basalt)
Aphanitic Mafic Igneous Rock with Vesicle Infillings
igneous
Dalmatian Jasper (Dalmatian Stone)
Peralkaline rhyolite
igneous
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Greenstone (Amygdaloidal Basalt)
Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)
igneous
Chert (Flint variety)
Chert (SiO2)
sedimentary
Banded Gneiss
Gneiss (variable mineral composition)
metamorphic
Red Jasper (possibly Red Coral or dyed Howlite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcite (Mineral; CaCO₃)
Mineral
Ferruginous Sandstone
Arenite with Iron Oxide matrix (Fe2O3)
sedimentary
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
metamorphic
Arkosic Sandstone
Arkose
sedimentary
Schist
Mica Schist (Medium-grade metamorphic rock)
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Vesicular Basalt with Quartz/Chalcedony
Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)
igneous
Schist
Schist (various mineral compositions)
metamorphic
Granite
Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)
igneous
Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)
Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates
igneous, sedimentary, and metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Coquina / Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Chrysocolla in Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)
mineral
Pink Granite
Phaneritic Plutonic Felsic Rock (K-feldspar rich)
igneous
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
sedimentary
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Basalt
Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)
igneous
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
sedimentary
Desert Rose (Gypsum Variety)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Pearl
Aragonite and Conchiolin (CaCO3 + organic protein)
mineraloid
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous