Rock Identifier

Category

Organic (Biological Organism)

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

Learn about Organic (Biological Organism) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Petrified Wood

Amber

Jet

Oil Shale

Peat

Pearl

Lizard Skin Jasper

Coral Rock

Opalized Wood

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Fossiliferous Flint or Chert with Bryozoan Fossils (Sedimentary cryptocrystalline quartz (SiO2) with fossil inclusions) — sedimentary

Fossiliferous Flint or Chert with Bryozoan Fossils

Sedimentary cryptocrystalline quartz (SiO2) with fossil inclusions

Limestone Pebble (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Amber (Succinates (C10H16O)) — mineraloid

Amber

Succinates (C10H16O)

Amber (Succinite (fossilized resin)) — Mineral

Amber

Succinite (fossilized resin)

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Tree Agate (also known as Dendritic Agate) (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — mineral

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Banded Chert (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Sedimentary Cryptocrystalline Quartz (SiO2)

Red coral earrings (Corallium rubrum or related precious coral (calcareous coral skeleton; primarily aragonite, CaCO₃)) — gemstone

Red coral earrings

Corallium rubrum or related precious coral (calcareous coral skeleton; primarily aragonite, CaCO₃)

Polished amber cabochon pendant (Amber (fossilized plant resin), chiefly polymerized succinite; approximate formula C10H16O) — gemstone

Polished amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized succinite; approximate formula C10H16O

Polished Baltic amber with insect inclusion (Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; likely succinite) — gemstone

Polished Baltic amber with insect inclusion

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; likely succinite

Tumbled amber-like inclusion (Likely amber (fossilized tree resin; complex polymer), but identification is uncertain from the image) — gemstone

Tumbled amber-like inclusion

Likely amber (fossilized tree resin; complex polymer), but identification is uncertain from the image

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Tumbled amber (Amber (fossilized plant resin), commonly succinite; organic mineraloid) — gemstone

Tumbled amber

Amber (fossilized plant resin), commonly succinite; organic mineraloid

Amber-bearing rough specimen (Fossilized plant resin (amber; organic mineraloid), commonly succinite) — gemstone

Amber-bearing rough specimen

Fossilized plant resin (amber; organic mineraloid), commonly succinite

Small yellow-orange mineral fragment, likely amber or iron-stained quartz (Possibly amber (fossilized resin; organic mineraloid) or quartz (SiO₂)) — mineral

Small yellow-orange mineral fragment, likely amber or iron-stained quartz

Possibly amber (fossilized resin; organic mineraloid) or quartz (SiO₂)

Amber (Fossilized tree resin; chiefly organic terpenoid resin (not a mineral)) — gemstone

Amber

Fossilized tree resin; chiefly organic terpenoid resin (not a mineral)

Amber (likely beach-worn amber or resinous material) (Fossilized plant resin; predominantly organic terpenoid polymers (succinite)) — gemstone

Amber (likely beach-worn amber or resinous material)

Fossilized plant resin; predominantly organic terpenoid polymers (succinite)

Bituminous Coal (Organic Sedimentary Rock (composed mostly of carbon with sulfur and hydrogen)) — sedimentary

Bituminous Coal

Organic Sedimentary Rock (composed mostly of carbon with sulfur and hydrogen)

Tumbled amber (Fossilized tree resin; commonly succinite (organic resin, not a mineral)) — fossil

Tumbled amber

Fossilized tree resin; commonly succinite (organic resin, not a mineral)

Petrified Wood (Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)

Amber (Succinite (Carbon-based organic compound; approximate formula C10H16O)) — Mineraloid

Amber

Succinite (Carbon-based organic compound; approximate formula C10H16O)

Iron-rich chert or jasper (Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite) — sedimentary

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Petrified wood (Silicified fossil wood, commonly quartz/chalcedony (SiO₂) replacing woody tissue) — fossil

Petrified wood

Silicified fossil wood, commonly quartz/chalcedony (SiO₂) replacing woody tissue

Likely bituminous coal (Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed visually) — sedimentary

Likely bituminous coal

Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed visually

Petrified wood (Silicified wood, commonly quartz (SiO₂) replacing woody tissue) — fossil

Petrified wood

Silicified wood, commonly quartz (SiO₂) replacing woody tissue

Chert (likely brown flint) (Microcrystalline quartz, SiO₂ (chalcedonic quartz aggregate)) — sedimentary

Chert (likely brown flint)

Microcrystalline quartz, SiO₂ (chalcedonic quartz aggregate)

Plume Agate (Cryptocrystalline Quartz (SiO2)) — Mineral/Gemstone

Plume Agate

Cryptocrystalline Quartz (SiO2)

Mineral/Gemstone

Fossil oyster shell fragment (Fossilized oyster (Ostreidae), composed mainly of calcite (CaCO₃)) — fossil

Fossil oyster shell fragment

Fossilized oyster (Ostreidae), composed mainly of calcite (CaCO₃)

Amber (Succinited (C10H16O)) — fossil

Amber

Succinited (C10H16O)

Chert / Fossiliferous Limestone (Sedimentary Chert (often containing CaCO3 or SiO2 replacements)) — sedimentary

Chert / Fossiliferous Limestone

Sedimentary Chert (often containing CaCO3 or SiO2 replacements)

Fossilized Coral (Petoskey Stone / Hexagonaria) (Hexagonaria percarinata / Rugosa coral (CaCO3)) — fossil

Fossilized Coral (Petoskey Stone / Hexagonaria)

Hexagonaria percarinata / Rugosa coral (CaCO3)

Pearl (Biogenic Gemstone) (Calcium Carbonate (Aragonite and Calcite) with Conchiolin) — gemstone

Pearl (Biogenic Gemstone)

Calcium Carbonate (Aragonite and Calcite) with Conchiolin

Limestone with Chert (Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions) — sedimentary

Limestone with Chert

Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions

Travertine (Calcareous tufa (CaCO3)) — sedimentary

Travertine

Calcareous tufa (CaCO3)

Carbonaceous Chondrite (CV3 type) (Carbonaceous Chondrite (CV3 group)) — meteorite

Carbonaceous Chondrite (CV3 type)

Carbonaceous Chondrite (CV3 group)

Fossiliferous Sandstone / Mudstone (Sedimentary Rock (Clastic with Fossiliferous Inclusions)) — sedimentary

Fossiliferous Sandstone / Mudstone

Sedimentary Rock (Clastic with Fossiliferous Inclusions)

Coquina (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)