Rock Identifier

Category

Mineral And Organic Gemstone

Browse mineral and organic gemstone specimens identified by the Rock Identifier community.

Learn about Mineral And Organic Gemstone in the encyclopedia

Black Shale

Jet

Malachite

Bumblebee Jasper

Bumblebee Jasper

Andesine

Aragonite

Dolomite

Albite

Pyrrhotite

Andesite

Andalusite

Andamooka Opal

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Quartz (Smoky/Rose Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Rose Quartz Pebble)

Silicon Dioxide (SiO2)

Pearl necklace (likely cultured pearls) (Pearl; chiefly aragonite (CaCO₃) in an organic conchiolin matrix) — gemstone

Pearl necklace (likely cultured pearls)

Pearl; chiefly aragonite (CaCO₃) in an organic conchiolin matrix

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper / Petrified Wood) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper / Petrified Wood)

Microcrystalline Quartz (SiO2)

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

Red Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (often called Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Silicon Dioxide (SiO2)

Coprolite (Fossilized Feces) — fossil

Coprolite

Fossilized Feces

Chert (Black Chert or Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Black Chert or Flint)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (Black Chert/Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Black Chert/Flint)

Microcrystalline quartz (SiO2)

Polished amber (Amber (fossilized plant resin; primarily organic polymerized terpenes)) — gemstone

Polished amber

Amber (fossilized plant resin; primarily organic polymerized terpenes)

Chert (specifically White Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossilized Nut / Coprolite / Concretion (Trace Fossil / Permineralized Plant Material) — fossil

Fossilized Nut / Coprolite / Concretion

Trace Fossil / Permineralized Plant Material

Amber (Succinite (Fossilized Tree Resin)) — fossil

Amber

Succinite (Fossilized Tree Resin)

Tumbled moss agate (Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions) — mineral

Tumbled moss agate

Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions

Amber (Succinates (C10H16O)) — mineraloid

Amber

Succinates (C10H16O)

Fossilized Shark Tooth (fragment) (Elasmobranchii (Class) fossil) — fossil

Fossilized Shark Tooth (fragment)

Elasmobranchii (Class) fossil

Amber (Succinicum (Organic compound, primarily C10H16O)) — Organic Gemstone (Mineraloid)

Amber

Succinicum (Organic compound, primarily C10H16O)

Organic Gemstone (Mineraloid)

Fossiliferous Shale (Carbonaceous Shale (with potential plant/aquatic fossils)) — sedimentary

Fossiliferous Shale

Carbonaceous Shale (with potential plant/aquatic fossils)

Fossil gastropod shell (Fossilized marine gastropod; exact genus/species cannot be determined from the image) — fossil

Fossil gastropod shell

Fossilized marine gastropod; exact genus/species cannot be determined from the image

Mocha Stone (Dendritic Agate) (Silicon Dioxide (SiO2) with Manganese/Iron inclusions) — sedimentary

Mocha Stone (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Tufa (Calcareous Tufa (CaCO3)) — sedimentary

Tufa

Calcareous Tufa (CaCO3)

Petrified Wood and Mixed Rocks (Silicified Wood (SiO2)) — fossil

Petrified Wood and Mixed Rocks

Silicified Wood (SiO2)

Chert (Smoky variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Smoky variety)

Microcrystalline Quartz (SiO2)

Moss Agate (Silicon Dioxide with inclusions (SiO2)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Pearl (Aragonite and Conchiolin (CaCO3 + organic protein)) — mineraloid

Pearl

Aragonite and Conchiolin (CaCO3 + organic protein)

Orbicular granite (likely Rapakivi-type granite) (Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende) — igneous

Orbicular granite (likely Rapakivi-type granite)

Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende

Fossilized Shark Tooth or Bone Fragment (Vertebrate Fossil (likely Carcharodon or similar genus)) — fossil

Fossilized Shark Tooth or Bone Fragment

Vertebrate Fossil (likely Carcharodon or similar genus)

Blue Apatite (Apatite, Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Moss Agate (Chalcedony (SiO2 with inclusions)) — mineral

Moss Agate

Chalcedony (SiO2 with inclusions)

Amber (Succinite (Resin C10H16O)) — mineral

Amber

Succinite (Resin C10H16O)

Amber (Succinite (Fossilized Tree Resin)) — mineraloid

Amber

Succinite (Fossilized Tree Resin)

Sandstone with Algae Growth (Arenite with Chlorophyta/Lichen) — sedimentary

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

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

Chert (and Flint variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Pyrite (Fool's Gold) in Matrix (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

Sandstone (Sandstone (Siliciclastic Sedimentary Rock)) — sedimentary

Sandstone

Sandstone (Siliciclastic Sedimentary Rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Pyrite in Matrix (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Chert (specifically Flint or Jasper variant) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Cryptocrystalline Quartz (SiO2)