Rock Identifier

Category

Organic (Non Rock)

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

Learn about Organic (Non Rock) in the encyclopedia

Mudstone

Bituminous Shale

Bituminous Shale

Hornfels

Black Shale

Oil Shale

Argillite

Sapropel

Common Opal in Host Rock (Hydrated Silica (SiO2·nH2O)) — mineraloid

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Precious Opal in Matrix (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Fossilized Shell Fragment (Invertebrate fossil (phylum Mollusca)) — fossil

Fossilized Shell Fragment

Invertebrate fossil (phylum Mollusca)

Fossiliferous Limestone with Rugose Coral (Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)) — sedimentary

Fossiliferous Limestone with Rugose Coral

Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)

Glauconitic Sandstone (Glauconitic Sandstone with high Glauconite concentration ((K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic Sandstone with high Glauconite concentration ((K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Asphalt aggregate (Human-made bituminous asphalt containing crushed silicate rock aggregate) — sedimentary

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Coal (Bituminous Coal / Anthracite) — sedimentary

Coal

Bituminous Coal / Anthracite

River Rock (Quartzite) (Quartzite (SiO2)) — metamorphic

River Rock (Quartzite)

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz Geode / Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Geode / Druzy Quartz

Silicon Dioxide (SiO2)

Shale or Slaty Mudstone (Argillaceous sedimentary rock) — sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Pink Marble (Recrystallized Limestone (Calcium Carbonate, CaCO3)) — metamorphic

Pink Marble

Recrystallized Limestone (Calcium Carbonate, CaCO3)

Quartz-rich granitic rock, possibly pegmatite (Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and mica) — igneous

Quartz-rich granitic rock, possibly pegmatite

Granite/pegmatitic granite; chiefly quartz (SiO₂), feldspar, and mica

Likely blue glass or synthetic gemstone jewelry (Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass) — gemstone

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Limestone Concretion (Calcium Carbonate Concretion (CaCO3)) — sedimentary

Limestone Concretion

Calcium Carbonate Concretion (CaCO3)

Weathered metallic meteorite candidate (Unclassified meteorite; appearance possibly iron meteorite or stony-iron material) — meteorite

Weathered metallic meteorite candidate

Unclassified meteorite; appearance possibly iron meteorite or stony-iron material

Mudstone (Argillaceous sedimentary rock (dominated by clay and silt-sized particles)) — sedimentary

Mudstone

Argillaceous sedimentary rock (dominated by clay and silt-sized particles)

Sandstone (Sandstone (Quartz-rich Arenite / SiO2)) — sedimentary

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Chert (Jasper type) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper type)

Microcrystalline Quartz (SiO2)

Iron-stained quartz-rich rock (likely ironstone/quartz vein material) (Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite; precise rock type cannot be confirmed visually) — metamorphic

Iron-stained quartz-rich rock (likely ironstone/quartz vein material)

Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite; precise rock type cannot be confirmed visually

Obsidian (Black Obsidian) (Amorphous volcanic glass (primarily SiO2)) — igneous

Obsidian (Black Obsidian)

Amorphous volcanic glass (primarily SiO2)

Poppy Jasper (Microcrystalline Quartz (SiO2) with mineral inclusions) — sedimentary

Poppy Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Greenstone (Celadonite-bearing Volcanic) (Hydrothermally altered basalt or andesite with Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)) — metamorphic

Greenstone (Celadonite-bearing Volcanic)

Hydrothermally altered basalt or andesite with Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Raw Emerald in Matrix (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Raw Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Quartzite with Iron Inclusions (Metamorphosed Quartz-rich Rock (SiO2)) — metamorphic

Quartzite with Iron Inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Quartzite (Metamorphic Rock (Quartzite), primarily SiO2) — metamorphic

Quartzite

Metamorphic Rock (Quartzite), primarily SiO2

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

Quartzite

Quartzite (SiO2-rich metamorphic rock)

Quartzite with inclusions (Metamorphosed Quartz-rich Rock (SiO2)) — metamorphic

Quartzite with inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Quartzite (Metamorphic Rock (composed mainly of SiO2)) — metamorphic

Quartzite

Metamorphic Rock (composed mainly of SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Metamorphosed Quartz Sandstone) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone

Black-and-white granite (Granite, primarily quartz–feldspar–biotite aggregate) — igneous

Black-and-white granite

Granite, primarily quartz–feldspar–biotite aggregate

Granodiorite (Granodiorite (intermediate plutonic rock)) — igneous

Granodiorite

Granodiorite (intermediate plutonic rock)

River Pebble (Greywacke or Quartzite-rich Sandstone) (Lithic Sandstone (primarily SiO2 with rock fragments)) — sedimentary

River Pebble (Greywacke or Quartzite-rich Sandstone)

Lithic Sandstone (primarily SiO2 with rock fragments)

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Polished agate/geode fragment (Microcrystalline quartz (chalcedony), SiO₂, with possible calcite or quartz cavity lining) — mineral

Polished agate/geode fragment

Microcrystalline quartz (chalcedony), SiO₂, with possible calcite or quartz cavity lining

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Basalt River Pebble (Mafic Igneous Rock (Fine-grained Basalt)) — igneous

Basalt River Pebble

Mafic Igneous Rock (Fine-grained Basalt)