Rock Identifier

Category

Sedimentary (Man Made Composite)

Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.

Echinoid Fossil (Sea Urchin) (Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)) — sedimentary

Echinoid Fossil (Sea Urchin)

Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)

Anthracite Coal (High-rank coal (primarily Carbon, C)) — metamorphic

Anthracite Coal

High-rank coal (primarily Carbon, C)

Chalcedony (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Zebra Jasper (Silicon dioxide (SiO2) with various impurities) — Sedimentary

Zebra Jasper

Silicon dioxide (SiO2) with various impurities

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide staining/cementing)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide staining/cementing)

Amber (Succinite) — mineral

Amber

Succinite

Quartz / Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Limonite (Ironstone) (Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)) — mineral

Limonite (Ironstone)

Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)

Red Quartzite (Quartzite (SiO2)) — metamorphic

Red Quartzite

Quartzite (SiO2)

Red Sandstone (Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)) — sedimentary

Red Sandstone

Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)

Chert (with possible fossils) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (with possible fossils)

Microcrystalline quartz (SiO2)

Anthracite (Anthracite Coal (C)) — sedimentary

Anthracite

Anthracite Coal (C)

Quartz Druze on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Yellow Quartzite (or Quartz River Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2)

Amber (Amber (C10H16O)) — mineral

Amber

Amber (C10H16O)

Amber (Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)) — Organic Mineraloid

Amber

Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)

Organic Mineraloid

Quartzite (clastic/metamorphic subtype) (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite (clastic/metamorphic subtype)

Quartzite (primarily Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Ferruginous Sandstone (Ironstone) (Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)) — sedimentary

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Chert (Chert / Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (primarily Chalcedony/Quartz, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Jasper (Red Jasper with Quartz veins) (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper (Red Jasper with Quartz veins)

Jasper (Silicon Dioxide, SiO2)

Picture Jasper (Silicon Dioxide (SiO2) with iron oxide and clay inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay inclusions

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Red Sandstone (Arenite (primarily Quartz and Feldspar with Iron Oxide cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz and Feldspar with Iron Oxide cement)

Apatite (Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

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

Jasper (Red Chert)

Jasper (Silicon Dioxide, SiO2)

Chert (and/or Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and/or Flint)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Jasper

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

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Chalcedony (Botryoidal) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Marble (Metamorphosed Limestone (principally CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (principally CaCO3)

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

Chert (varietal Flint)

Silicon Dioxide (SiO2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Magnetite (Lodestone) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone)

Magnetite (Fe3O4)

Sandstone Concretion (Ferruginous Sandstone Concretion) — sedimentary

Sandstone Concretion

Ferruginous Sandstone Concretion

Almandine Garnet in Matrix (Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix) — metamorphic

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — sedimentary

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Quartz (Milky or White Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Mica Schist (Garnetiferous) (Garnet-Mica Schist) — metamorphic

Mica Schist (Garnetiferous)

Garnet-Mica Schist