Rock Identifier

Category

Organic (Paper And Cellulose)

Browse organic (paper and cellulose) specimens identified by the Rock Identifier community.

Shale or Argillite (Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)) — Sedimentary or Metamorphic (low grade)

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)
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)

sedimentary
Mookaite Jasper (Siliceous (chert) sedimentary rock, a form of Jasper) — Sedimentary

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Sedimentary
Pyrite (Pyrite (Iron sulfide, FeS₂)) — mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

mineral
Conglomerate (Conglomerate) — Sedimentary Rock

Conglomerate

Conglomerate

Sedimentary Rock
Petrified Wood (Silicified wood (Quartz/Chalcedony)) — Sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Sedimentary
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony) (Chert (microcrystalline quartz)) — Metamorphic Rock

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Metamorphic Rock
Shale (possibly) (Shale (fine-grained clastic sedimentary rock)) — sedimentary

Shale (possibly)

Shale (fine-grained clastic sedimentary rock)

sedimentary
Amber (and Citrine Quartz) (Succinite (Amber) and Silicon Dioxide (SiO2)) — Organic Mineraloid and Mineral

Amber (and Citrine Quartz)

Succinite (Amber) and Silicon Dioxide (SiO2)

Organic Mineraloid and Mineral
Anthracite Coal (Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)

metamorphic
Fossil Shark Tooth (Cretaceous white shark type) (Squalicorax (commonly known as Crow Shark)) — Organic specimen (fossil)

Fossil Shark Tooth (Cretaceous white shark type)

Squalicorax (commonly known as Crow Shark)

Organic specimen (fossil)
Mother of Pearl (Nacre) (Calcium Carbonate (primarily aragonite, with conchiolin)) — Organic Gemstone/Biomineral

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)

Organic Gemstone/Biomineral
Baroque Pearl (and potentially a small Sapphire/Blue Topaz) (Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.) — Organic Gemstone (for pearl), Mineral (for sapphire/topaz)

Baroque Pearl (and potentially a small Sapphire/Blue Topaz)

Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.

Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Coral (Precious Coral) (Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).) — Mineral, Organic Gemstone

Coral (Precious Coral)

Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).

Mineral, Organic Gemstone
Ambergris (Ambrein-rich Calculus) — Organic (Pseudo-geological)

Ambergris

Ambrein-rich Calculus

Organic (Pseudo-geological)
Amber ((C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.) — Mineral

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Mineral
Biological Bone (Patella/Knee) (Patella (part of the Human Skeletal System)) — Organic Structure (Not a Rock)

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Organic Structure (Not a Rock)
Baltic Amber (Butterscotch or Egg Yolk Variety) (Fossilized Tree Resin (Succinite); Approximate formula: C10H16O) — Organic Gemstone (Succinite)

Baltic Amber (Butterscotch or Egg Yolk Variety)

Fossilized Tree Resin (Succinite); Approximate formula: C10H16O

Organic Gemstone (Succinite)
Amber (Fossilized Tree Resin (Amorphous Hydrocarbon)) — Mineral

Amber

Fossilized Tree Resin (Amorphous Hydrocarbon)

Mineral
Baltic Amber (Butterscotch variety) (Succinite) — Organic Gemstone/Mineraloid

Baltic Amber (Butterscotch variety)

Succinite

Organic Gemstone/Mineraloid
Ambergris (Ambra grisea (Metabolic byproduct)) — Organic (Geological relative)

Ambergris

Ambra grisea (Metabolic byproduct)

Organic (Geological relative)
Baltic Amber (Butterscotch or Egg Yolk Variety) (Succinite (C10H16O)) — Organic Gemstone (Mineraloid)

Baltic Amber (Butterscotch or Egg Yolk Variety)

Succinite (C10H16O)

Organic Gemstone (Mineraloid)
Sea Bean (Hamburger Bean) (Mucuna sloanei) — organic/biological specimen

Sea Bean (Hamburger Bean)

Mucuna sloanei

organic/biological specimen
Amber (Simulated/Faturan Style) (Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)) — Organic Gemstone (not a mineral)

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Organic Gemstone (not a mineral)
Ambergris (Ambra grisea) — Organic (often found by beachcombers)

Ambergris

Ambra grisea

Organic (often found by beachcombers)
Baltic Amber (Butterscotch or Egg Yolk Variety) (Succinite (C10H16O)) — Organic Gemstone (fossilized resin)

Baltic Amber (Butterscotch or Egg Yolk Variety)

Succinite (C10H16O)

Organic Gemstone (fossilized resin)
Ambergris (Physeter macrocephalus excreta (Ambergris)) — mineraloid / organic geological find

Ambergris

Physeter macrocephalus excreta (Ambergris)

mineraloid / organic geological find
Ambergris (Sea Wax) (Physeter macrocephalus fecalith) — Organic geological/oceanic specimen

Ambergris (Sea Wax)

Physeter macrocephalus fecalith

Organic geological/oceanic specimen
Anthracite Coal (Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)

metamorphic
Amber (Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.) — Mineral

Amber

Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.

Mineral
Fossilized Shark Teeth (Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)) — sedimentary (fossilized organic matter)

Fossilized Shark Teeth

Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)

sedimentary (fossilized organic matter)
Brachiopod Fossil (Spiriferid) (Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)) — sedimentary (fossilized organic remain)

Brachiopod Fossil (Spiriferid)

Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)

sedimentary (fossilized organic remain)
Brachiopod Fossil (Spiriferid) (Phylum Brachiopoda, Order Spiriferida (CaCO3 - Calcium Carbonate)) — sedimentary (fossilized organic remains)

Brachiopod Fossil (Spiriferid)

Phylum Brachiopoda, Order Spiriferida (CaCO3 - Calcium Carbonate)

sedimentary (fossilized organic remains)
Orange Tabby (Felis catus) (Felis silvestris catus (variety: Red Mackerel Tabby)) — Organic/Biological specimen (Non-Mineral)

Orange Tabby (Felis catus)

Felis silvestris catus (variety: Red Mackerel Tabby)

Organic/Biological specimen (Non-Mineral)
Ambergris (Ambrein (C30H52O)) — mineraloid / organic geological substance

Ambergris

Ambrein (C30H52O)

mineraloid / organic geological substance
Goldfish Cracker (Culinary Mimic) (Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)) — Anthropogenic Sedimentary-style Organic Solid

Goldfish Cracker (Culinary Mimic)

Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)

Anthropogenic Sedimentary-style Organic Solid
Red Coral (Corallium rubrum (Calcium Carbonate, CaCO3)) — Organic Gemstone (Sedimentary classification)

Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Organic Gemstone (Sedimentary classification)
Red Coral (Corallium rubrum (for precious red coral), although other species like Corallium japonicum and Paracorallium are also used.) — Organic Gemstone (not a rock or mineral in the traditional sense, but bio-mineralized material)

Red Coral

Corallium rubrum (for precious red coral), although other species like Corallium japonicum and Paracorallium are also used.

Organic Gemstone (not a rock or mineral in the traditional sense, but bio-mineralized material)
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate) (N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)) — Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
N/A (Non-Geological Specimen) — N/A

N/A (Non-Geological Specimen)

N/A
The user-provided image does not contain a rock or mineral specimen — N/A

The user-provided image does not contain a rock or mineral specimen

N/A
Andesite River Stones (Andesite) — igneous

Andesite River Stones

Andesite

igneous