Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Shale
Sedimentary rock composed of clay minerals and quartz
sedimentary
Greenstone / Greenschist
Greenschist (composed of Chlorite, Epidote, and Actinolite)
metamorphic
Green Quartz
Silicon Dioxide (SiO2)
mineral
Serpentine-rich rock (possibly lizardite/serpentinite)
Serpentinite, composed chiefly of serpentine-group minerals such as lizardite, antigorite, or chrysotile
metamorphic
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Bauxite
Bauxite (principal ore of aluminum, primarily Al(OH)3)
sedimentary
Bauxite (Laterite)
Hydrated aluminum oxides (Al2O3·nH2O)
sedimentary
Bauxite
Bauxite (Aluminum Ore)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Starfish Fossil
Asteroidea fossil
fossil
Red Sandstone
Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock
igneous
Polished red jasper pendant
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
gemstone
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Limonite (with Goethite/Hematite glaze)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Likely mica-rich schist
Mica schist, probably muscovite- or biotite-bearing; exact minerals cannot be confirmed from the photo
metamorphic
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
metamorphic
Indigo Gabbro
Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)
igneous
Shale / Mudstone
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase Feldspar)
igneous
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)
FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)
mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Mixed Mineral and Rock Collection
Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)
mineral
Megalodon Shark Tooth
Otodus megalodon
fossil
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basaltic rock composed chiefly of plagioclase feldspar and pyroxene, with possible olivine and iron-oxide minerals
igneous
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Shale
Shale
sedimentary
Chert in Limestone
Sedimentary rock composed of microcrystalline quartz and calcite
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary