Red Tuff / Sandstone
Rhyolitic Tuff / Pyroclastic Volcanic Rock
igneous
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicon Dioxide Fossilized Wood (SiO2)
fossil
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Red Jasper / Chert
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
igneous
Sandstone / Weathered Quartzite
Sandstone (Quartz Arenite)
sedimentary
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Gastropod Fossil (Snail Steinkern)
Class Gastropoda (internal mold)
sedimentary
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Green aventurine beads
Quartz (SiO₂), typically green quartzite/aventurine with fuchsite mica inclusions
mineral
Anthracite Coal
Anthracite (Carbon-rich Sedimentary Rock)
sedimentary
Sulfur (in host rock)
Native Sulfur (S8)
mineral
Desert Rose
Baryte or Gypsum variation (CaSO4·2H2O or BaSO4)
mineral
Quartz Vein in Sandstone
Quartz (SiO2) in Clastic Sedimentary Rock
sedimentary
Milky Quartz (with Iron Oxide staining)
Quartz (Silicon Dioxide - SiO2)
mineral
Serpentinite (often containing Jadeite/Nephrite)
Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4
metamorphic
Jasp-Agate
Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions
sedimentary
Chert (specifically Flint or Dark Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Quartz Arenite / Sandstone
Quartz sandstone (SiO2 rich clastic sedimentary rock)
sedimentary
Likely chert or flint
Microcrystalline quartz (SiO₂), commonly called chert; exact identification requires testing
sedimentary
Shale with Trace Fossils
Fissile mudrock (Shale)
sedimentary
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Agate
Chalcedony (Cryptocrystalline variety of Quartz, SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (containing Quartz/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Basalt
Basalt (Igneous Volcanic)
igneous
Diamond
Carbon (C)
gemstone
Banded Chert (River Siltstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Red Sandstone
Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Vesicular Basalt (Iron Scoria)
Aphanitic Mafic Igneous Rock with Vesicular Texture
igneous
Diamond
Carbon (C)
gemstone
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous