Rock Identifier

Category

Mineral, Organic Gemstone

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

Learn about Mineral, Organic Gemstone in the encyclopedia

Black Shale

Jet

Malachite

Chert (and/or Chalcedony) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (and/or Chalcedony)

Microcrystalline Silica (SiO2)

Chert (variations include Flint/Novaculite) (Chert (formula: SiO2)) — sedimentary

Chert (variations include Flint/Novaculite)

Chert (formula: SiO2)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Mammoth Molar Fossil (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Molar Fossil

Mammuthus primigenius (Tooth fragment)

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

Chert (Flint)

Chert (SiO2)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

Moss Agate (Chalcedony (SiO2) with inclusions of hornblende or chlorite) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of hornblende or chlorite

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

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

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

Moss Agate

Chalcedony (Silicon Dioxide) with inclusions - SiO2

Dendritic Agate (Chalcedony (SiO2) with manganese/iron oxide inclusions) — mineral

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Graphite (Carbon (C)) — mineral

Graphite

Carbon (C)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Polished bloodstone (heliotrope) (Chalcedony (microcrystalline quartz, SiO₂) with red iron-oxide inclusions) — mineral

Polished bloodstone (heliotrope)

Chalcedony (microcrystalline quartz, SiO₂) with red iron-oxide inclusions

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Tree Agate (Silicon Dioxide (SiO2) with Dendritic Inclusions) — Mineral

Tree Agate

Silicon Dioxide (SiO2) with Dendritic Inclusions

Fossilized tooth, likely a mammalian tooth fragment (Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth) — fossil

Fossilized tooth, likely a mammalian tooth fragment

Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth

Chert (Yellow Jasper/Flint) (Silicon dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Yellow Jasper/Flint)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Rough Garnet (Almandine) (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Chert (often called Flint or Jasper based on color) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper based on color)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Chert (Microcrystalline Quartz, SiO2)

Fossilized Tooth (Vertebrate Fossilized Tooth (Mineralized Biogenic Material)) — fossil

Fossilized Tooth

Vertebrate Fossilized Tooth (Mineralized Biogenic Material)

Mammoth Tooth (Mammuthus tooth) — fossil

Mammoth Tooth

Mammuthus tooth

Fossil Shark Tooth (Selachii fossil) — fossil

Fossil Shark Tooth

Selachii fossil

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)

Glauconitic Sandstone (Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Chert (Iron-stained) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Chert (Silicon dioxide (SiO2)) — Sedimentary

Chert

Silicon dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Fossilized coral (likely honeycomb or branching coral) (Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃) — fossil

Fossilized coral (likely honeycomb or branching coral)

Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃

Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

Amber and Tumbled Stones (Fossilized Tree Resin (Succinite)) — fossil

Amber and Tumbled Stones

Fossilized Tree Resin (Succinite)

Amber (Succinite (Resinite)) — fossil

Amber

Succinite (Resinite)

Green Moss Agate (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — sedimentary

Green Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Red Moss Agate (Jasper) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Moss Agate (Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Amber (Amber (Succinite), fossilized tree resin) — Mineraloid

Amber

Amber (Succinite), fossilized tree resin

Amber (with potentially inclusions) (Succinite (Fossilized Tree Resin)) — Mineraloid

Amber (with potentially inclusions)

Succinite (Fossilized Tree Resin)