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

Petrified Wood (Fossilized plant material (Silicon dioxide - SiO2)) — fossil

Petrified Wood

Fossilized plant material (Silicon dioxide - SiO2)

Fossil shell fragment (likely brachiopod or bivalve) (Indeterminate fossilized carbonate shell; likely Brachiopoda or Bivalvia) — fossil

Fossil shell fragment (likely brachiopod or bivalve)

Indeterminate fossilized carbonate shell; likely Brachiopoda or Bivalvia

Fairy Stone (Menilite Concretion) (Carbonate-rich concretion (often Siderite or Calcite in Clay)) — sedimentary

Fairy Stone (Menilite Concretion)

Carbonate-rich concretion (often Siderite or Calcite in Clay)

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

Chert (Flint)

Silicon dioxide (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Brown Variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Calcite–fluorite mineral specimen with iron-oxide staining (Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides) — mineral

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Opal (in Jewelry Setting) (Hydrated Silicon Dioxide (SiO2·nH2O)) — gemstone

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Tektite (Indochinite) (Natural glass (High-silica impact glass)) — mineral

Tektite (Indochinite)

Natural glass (High-silica impact glass)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Chert Pebble (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert Pebble

Chert (Silicon Dioxide, SiO2)

Amber (Succinited (C10H16O)) — fossil

Amber

Succinited (C10H16O)

Amber (Succinite) — mineral

Amber

Succinite

Fossilized Plant or Tree Bark (Lepidodendron or Sigillaria (example genera)) — sedimentary

Fossilized Plant or Tree Bark

Lepidodendron or Sigillaria (example genera)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Chert (with nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Tektite (Natural Impact Glass) — meteorite

Tektite

Natural Impact Glass

Chert (Jasper/Flint variety) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper/Flint variety)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Tumbled chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

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

Chert (Flint)

Silicon dioxide (SiO2)

Chert (Nodule/Common Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Nodule/Common Chert)

Microcrystalline quartz (SiO2)

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Black Obsidian (Volcanic Glass (felsic volcanic glass, rich in SiO2)) — igneous

Black Obsidian

Volcanic Glass (felsic volcanic glass, rich in SiO2)

Coarse Sand or Fine Gravel (Detrital Sedimentary Fragments (mostly SiO2)) — sedimentary

Coarse Sand or Fine Gravel

Detrital Sedimentary Fragments (mostly SiO2)

Chert (Flint Nodules) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint Nodules)

Silicon dioxide (SiO2)

Chert (Jasper variation) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Jasper variation)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (with potential fossil inclusion) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with potential fossil inclusion)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (SiO2)