Rock Identifier

Category

Organic Gemstone (Not A Mineral)

Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.

Learn about Organic Gemstone (Not A Mineral) in the encyclopedia

Black Shale

Jet

Malachite

Sapropel

Bituminous Shale

Bituminous Shale

Red Garnet

Shungite

Anatase

Sperrylite

Petrified Wood

Amber

Hutcheonite

Chert (Yellow Jasper/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Amber (fossilized tree resin) (Fossilized plant resin; commonly succinite (not a mineral, largely organic polymer)) — fossil

Amber (fossilized tree resin)

Fossilized plant resin; commonly succinite (not a mineral, largely organic polymer)

Amber (likely a small polished amber piece) (Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.) — gemstone

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Amber (Succinates (Fossilized Tree Resin)) — mineraloid

Amber

Succinates (Fossilized Tree Resin)

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

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

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Amber (Fossilized tree resin; primarily polymerized terpenoid resin (succinite)) — gemstone

Amber

Fossilized tree resin; primarily polymerized terpenoid resin (succinite)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Pearl (Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin

Chert (Brown Variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Silicon Dioxide, SiO2)

Likely bituminous coal (Coal, predominantly carbon-rich organic matter with variable maceral and mineral content) — sedimentary

Likely bituminous coal

Coal, predominantly carbon-rich organic matter with variable maceral and mineral content

Elephant Skin Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Elephant Skin Jasper

Microcrystalline Quartz (SiO2)

Green sea glass (likely) (Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass) — mineral

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Polished amber (Amber (fossilized plant resin; commonly succinite, not a mineral)) — gemstone

Polished amber

Amber (fossilized plant resin; commonly succinite, not a mineral)

Mother of Pearl (Nacre) (Calcium Carbonate (Aragonite) with organic conchiolin) — gemstone

Mother of Pearl (Nacre)

Calcium Carbonate (Aragonite) with organic conchiolin

Honey-colored amber (possibly copal) (Amber: fossilized tree resin, an organic mineraloid; composition varies, mainly carbon, hydrogen, and oxygen) — gemstone

Honey-colored amber (possibly copal)

Amber: fossilized tree resin, an organic mineraloid; composition varies, mainly carbon, hydrogen, and oxygen

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

Chert (with Lichen)

Microcrystalline Quartz (SiO2)

Amber (Succinite (approximate formula C10H16O)) — mineraloid

Amber

Succinite (approximate formula C10H16O)

Fossilized Gastropod / Coral (Phylum Mollusca / Cnidaria (Silicified or Calcified)) — fossil

Fossilized Gastropod / Coral

Phylum Mollusca / Cnidaria (Silicified or Calcified)

Amber (Succinite (fossilized tree resin, C10H16O)) — fossil

Amber

Succinite (fossilized tree resin, C10H16O)

Jasper (Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)) — sedimentary

Jasper

Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)

Chert (Iron-stained) (Microcrystalline silica (SiO2) with trace Iron oxide (Fe2O3)) — sedimentary

Chert (Iron-stained)

Microcrystalline silica (SiO2) with trace Iron oxide (Fe2O3)

Red Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Red Chert

Microcrystalline Quartz (SiO2)

Chert (Basanite / Jasperoid) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Basanite / Jasperoid)

Microcrystalline Quartz (SiO2)

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

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

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

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Chert (Yellow or Brown Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Brown Jasper)

Microcrystalline Quartz (SiO2)

Pearl (Nacre (aragonite, CaCO₃, with conchiolin)) — gemstone

Pearl

Nacre (aragonite, CaCO₃, with conchiolin)

Amber (specifically Red or Cherry Amber) (Succinite (Resinite); Chemical formula: C10H16O) — Mineraloid

Amber (specifically Red or Cherry Amber)

Succinite (Resinite); Chemical formula: C10H16O

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (White Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (White Flint)

Silicon Dioxide (SiO2)

Chert (Green and Black Jasper variant) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Green and Black Jasper variant)

Cryptocrystalline Quartz (SiO2)

Sedimentary Rock with Crafts (Pet Rock) (Sedimentary rock decorated with synthetic materials) — sedimentary

Sedimentary Rock with Crafts (Pet Rock)

Sedimentary rock decorated with synthetic materials

Pink Coral (Corallium rubrum (or related species, composed of calcium carbonate)) — gemstone

Pink Coral

Corallium rubrum (or related species, composed of calcium carbonate)

Moss agate bracelet (Chalcedony (microcrystalline quartz, SiO₂) with chlorite/amphibole inclusions) — gemstone

Moss agate bracelet

Chalcedony (microcrystalline quartz, SiO₂) with chlorite/amphibole inclusions

Black Pearl (Tahitian Type) (Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)) — Organic Gemstone

Black Pearl (Tahitian Type)

Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)

Organic Gemstone