Rock Identifier

Category

Organic (Mineraloid)

Browse organic (mineraloid) specimens identified by the Rock Identifier community.

Greenstone (Metabasalt / Greenschist facies rock) — metamorphic

Greenstone

Metabasalt / Greenschist facies rock

Hag Stone (Sandstone with Boreholes) (Bored Sandstone (Sedimentary rock with lithophaga-style borings)) — sedimentary

Hag Stone (Sandstone with Boreholes)

Bored Sandstone (Sedimentary rock with lithophaga-style borings)

Graywacke (Lithic Sandstone (Graywacke)) — sedimentary

Graywacke

Lithic Sandstone (Graywacke)

Diorite (Porphyritic) (Porphyritic Diorite) — igneous

Diorite (Porphyritic)

Porphyritic Diorite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Drill Core Sample (Cylindrical Rock Core (Specific mineralogy varies by extraction site)) — Metamorphic (Likely Gneiss or Schist based on texture)

Drill Core Sample

Cylindrical Rock Core (Specific mineralogy varies by extraction site)

Metamorphic (Likely Gneiss or Schist based on texture)

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn)2-3(Si, Al, Fe)2O5(OH)4

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

Banded River Rock / Gneiss (highly weathered)

Gneiss

Metamorphic rock

Greenish Metamorphic Rock (likely containing epidote or chlorite) (Metamorphic rock, possibly epidosite or greenstone) — Metamorphic

Greenish Metamorphic Rock (likely containing epidote or chlorite)

Metamorphic rock, possibly epidosite or greenstone

Granite (Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)

Sandstone (with potential trace fossils) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Eclogite (Eclogite (Omphacite-Garnet rock)) — metamorphic

Eclogite

Eclogite (Omphacite-Garnet rock)

Granite (Intrusive Phaneritic Felsic Igneous Rock) — igneous

Granite

Intrusive Phaneritic Felsic Igneous Rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Schist (Diamond Drill Core)

Mica Schist

Phyllite (Phyllite (Intermediate grade metamorphic rock)) — metamorphic

Phyllite

Phyllite (Intermediate grade metamorphic rock)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Gneiss (Gneiss (a type of metamorphic rock)) — Metamorphic Rock

Gneiss

Gneiss (a type of metamorphic rock)

Metamorphic Rock

Greenschist (Greenschist facies metamorphic rock) — metamorphic

Greenschist

Greenschist facies metamorphic rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Banded Gneiss (Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)

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

Schist

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

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

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)

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

Eclogite

Eclogite (Omphacite + Almandine-Pyrope Garnet)

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

Gabbro

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

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

Green Slate (Greenstone) (Foliated Metamorphic Rock (rich in Chlorite/Epidote)) — metamorphic

Green Slate (Greenstone)

Foliated Metamorphic Rock (rich in Chlorite/Epidote)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Porphyritic Rhyolite or Andesite (Porphyry) (Porphyritic igneous rock (Composition depends on exact mineralogy, often Rhyolite or Andesite)) — igneous

Porphyritic Rhyolite or Andesite (Porphyry)

Porphyritic igneous rock (Composition depends on exact mineralogy, often Rhyolite or Andesite)

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)

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

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

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·nH2O)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)