Rock Identifier

Category

Organic Mineraloid

Browse organic mineraloid specimens identified by the Rock Identifier community.

Schist (Diamond Drill Core) (Mica Schist) — metamorphic

Schist (Diamond Drill Core)

Mica Schist

Banded River Rock / Gneiss (highly weathered) (Gneiss) — Metamorphic rock

Banded River Rock / Gneiss (highly weathered)

Gneiss

Metamorphic rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Intrusive Phaneritic Felsic Igneous Rock) — igneous

Granite

Intrusive Phaneritic Felsic Igneous Rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Schist (Schist (various mineralogical compositions including mica, chlorite, talc, etc.)) — Metamorphic

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Quartzite (Quartzite (SiO2-dominant rock)) — metamorphic

Quartzite

Quartzite (SiO2-dominant rock)

Granite (Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)) — Igneous

Granite

Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Pegmatite (likely Granitic Pegmatite) (Pegmatite (a coarse-grained igneous rock, often with granitic composition)) — igneous

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Green Schist (Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Eclogite garnet in matrix (Eclogite (Garnet-Omphacite rock)) — metamorphic

Eclogite garnet in matrix

Eclogite (Garnet-Omphacite rock)

Sandstone Concretion (Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone Concretion

Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)

Diorite (Diorite (an intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (an intermediate intrusive igneous rock)

Prasiolite and Quartz Crystal Cluster (Quartz (SiO2); Prasiolite is a variety of Quartz) — mineral

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Brick (Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)) — Man-made material (constructed)

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Man-made material (constructed)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Limonite (Ironstone Concretion) (Limonite (Hydrous Ferric Oxides mixed with Goethite)) — sedimentary

Limonite (Ironstone Concretion)

Limonite (Hydrous Ferric Oxides mixed with Goethite)

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

Eclogite (Eclogite (Omphacite + Almandine-Pyrope Garnet)) — metamorphic

Eclogite

Eclogite (Omphacite + Almandine-Pyrope Garnet)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Gabbro (Gabbro (composed mainly of calcium-rich plagioclase feldspar and pyroxene)) — igneous

Gabbro

Gabbro (composed mainly of calcium-rich plagioclase feldspar and pyroxene)

Greywacke with Quartz Vein (Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)) — sedimentary

Greywacke with Quartz Vein

Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

Sandstone (Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)) — Sedimentary Rock

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Sedimentary Rock

Charoite (Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)) — metamorphic

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)

Tiger's Eye (with Hematite/Jasper) (SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)) — mineralogical

Tiger's Eye (with Hematite/Jasper)

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Diorite (Diorite (Intermediate plutonic rock)) — igneous

Diorite

Diorite (Intermediate plutonic rock)

Greisen (Greisen) — Metamorphic

Greisen

Greisen

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Hypersthene ((Mg,Fe)SiO3 - Enstatite-Ferrosilite series) — mineral

Hypersthene

(Mg,Fe)SiO3 - Enstatite-Ferrosilite series

Stromatolite (Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)) — sedimentary

Stromatolite

Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)

Chert (Chert (microcrystalline quartz, SiO2)) — sedimentary

Chert

Chert (microcrystalline quartz, SiO2)

Quartz Vein in Host Rock (Gneiss/Schist) (Silicon Dioxide (SiO2) within a metamorphic matrix) — metamorphic

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Fossilized Bivalve Shell (Bivalvia (fossil specimen)) — sedimentary

Fossilized Bivalve Shell

Bivalvia (fossil specimen)

Limestone (Calcareous sedimentary rock (primarily CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (primarily CaCO3)