Rock Identifier

Category

Mineral, Sediment

Browse mineral, sediment specimens identified by the Rock Identifier community.

Learn about Mineral, Sediment in the encyclopedia

Sea Sediment Jasper

Claystone

Sapropel

Phosphorite

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Banded iron formation (ironstone) (BIF; hematite–magnetite–quartz/chert assemblage) — sedimentary

Banded iron formation (ironstone)

BIF; hematite–magnetite–quartz/chert assemblage

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Iron-stained chert or silicified ironstone (Microcrystalline quartz (SiO₂), likely limonite/goethite-bearing chert) — sedimentary

Iron-stained chert or silicified ironstone

Microcrystalline quartz (SiO₂), likely limonite/goethite-bearing chert

River Rock (Siliciclastic rock (water-worn pebble)) — sedimentary

River Rock

Siliciclastic rock (water-worn pebble)

Fossil Shark Tooth (Elasmobranchii (Class) fossil - possibly Odontaspididae family) — fossil

Fossil Shark Tooth

Elasmobranchii (Class) fossil - possibly Odontaspididae family

Graywacke (Lithic Sandstone (Graywacke)) — sedimentary

Graywacke

Lithic Sandstone (Graywacke)

Red Jasper (Jasper (a variety of Quartz, SiO2)) — Mineral

Red Jasper

Jasper (a variety of Quartz, SiO2)

Quartz (Crystal Point/Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Crystal Point/Fragment)

Silicon Dioxide (SiO2)

Micrometeorite (Spherule) (Extraterrestrial Accretion Spherule) — mineral

Micrometeorite (Spherule)

Extraterrestrial Accretion Spherule

Petrified Wood (Silicified wood (primarily quartz, SiO2)) — fossil

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Muscovite (Muscovite, KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

Muscovite, KAl2(AlSi3O10)(OH)2

Honey calcite (calcite-rich limestone/marble fragment) (Calcite — CaCO₃; likely coarse crystalline calcitic rock) — mineral

Honey calcite (calcite-rich limestone/marble fragment)

Calcite — CaCO₃; likely coarse crystalline calcitic rock

Milky Quartz (Water-worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood / Permineralized wood (SiO2)) — fossil

Petrified Wood

Silicified wood / Permineralized wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Zebra Jasper (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Zebra Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Zebra Jasper (Silicified sedimentary rock (SiO2) with mineral inclusions) — sedimentary

Zebra Jasper

Silicified sedimentary rock (SiO2) with mineral inclusions

Magnetite (Small Granule) (Magnetite (Fe3O4)) — mineral

Magnetite (Small Granule)

Magnetite (Fe3O4)

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Fossil Coral (Cnidaria fossil (often Calcium Carbonate / CaCO3)) — sedimentary

Fossil Coral

Cnidaria fossil (often Calcium Carbonate / CaCO3)

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron inclusions

Echinoidea (Fossil Sea Urchin) (Echinodermata Echinoidea) — sedimentary

Echinoidea (Fossil Sea Urchin)

Echinodermata Echinoidea

Fossil Shark Tooth (Selachimorpha (Chondrichthyes dental fossil)) — sedimentary

Fossil Shark Tooth

Selachimorpha (Chondrichthyes dental fossil)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Polished striped jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions) — sedimentary

Polished striped jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions

Jasper (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Polychrome Jasper (Desert Jasper) (Silicon Dioxide (SiO2) with iron and mineral inclusions) — sedimentary

Polychrome Jasper (Desert Jasper)

Silicon Dioxide (SiO2) with iron and mineral inclusions

Dark metamorphic rock, likely hornfels or fine-grained basalt (Probable hornfels; commonly quartz–feldspar–mica with variable amphibole/pyroxene) — metamorphic

Dark metamorphic rock, likely hornfels or fine-grained basalt

Probable hornfels; commonly quartz–feldspar–mica with variable amphibole/pyroxene

Gastropod Fossil (Snail Internal Mold) (Gastropoda; internal mold (steinkern), often composed of Calcium Carbonate (CaCO3) or Silica (SiO2)) — sedimentary

Gastropod Fossil (Snail Internal Mold)

Gastropoda; internal mold (steinkern), often composed of Calcium Carbonate (CaCO3) or Silica (SiO2)

Weathered limestone (Calcitic limestone, mainly calcium carbonate (CaCO₃)) — sedimentary

Weathered limestone

Calcitic limestone, mainly calcium carbonate (CaCO₃)

Mica (Muscovite / Biotite (Phyllosilicate group)) — mineral

Mica

Muscovite / Biotite (Phyllosilicate group)

Petrified Wood / Fossilized Bone (Silicified / Mineralized Fossil (Silica SiO2)) — fossil

Petrified Wood / Fossilized Bone

Silicified / Mineralized Fossil (Silica SiO2)

Sandstone (Arenite (SiO2 based clastic rock)) — sedimentary

Sandstone

Arenite (SiO2 based clastic rock)

Ironstone Concretion (Limonite/Goethite) (Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)

Fuchsite Schist (Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist) — metamorphic

Fuchsite Schist

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint / Quartz Nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint / Quartz Nodule)

Microcrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Fossilized Ray Barb (Stinger) Fragment (Myliobatiformes indet. (Fossil stingray spine)) — fossil

Fossilized Ray Barb (Stinger) Fragment

Myliobatiformes indet. (Fossil stingray spine)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)