Rock Identifier

Category

Sedimentary (Biogenic Sediment Or Biological Remain)

Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.

Crazy Lace Agate (Cryptocrystalline Quartz (Silicon Dioxide, SiO2)) — mineral

Crazy Lace Agate

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (Nodule / Geode fragment) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule / Geode fragment)

Microcrystalline Quartz (SiO2)

Chert (Brecciated or Veined) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brecciated or Veined)

Silicon Dioxide (SiO2)

Banded Chert (Ironstone/Jasper) (Cryptocrystalline Quartz (SiO2) with Iron Oxides) — sedimentary

Banded Chert (Ironstone/Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxides

Chert (specifically a stream-worn Chert Nodule) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Chert (variations include Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

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

Banded Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Chert Pebble with Quartz Veins (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Chert (Silicon dioxide (SiO2)) — sedimentary

Chert

Silicon dioxide (SiO2)

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

Grey and White Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Amber (Amber (Fossilized Tree Resin)) — Mineral

Amber

Amber (Fossilized Tree Resin)

Chert (specifically Tan/Brown Chert) (Chert (SiO2)) — sedimentary

Chert (specifically Tan/Brown Chert)

Chert (SiO2)

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

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Amber (Succinite (organic hydrocarbon)) — mineraloid

Amber

Succinite (organic hydrocarbon)

Turquoise and Red Coral (Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)) — mineral

Turquoise and Red Coral

Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)

Amber (Succinite (C10H16O)) — Mineraloid

Amber

Succinite (C10H16O)

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

Limonite (Yellow Ochre)

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

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

Amber

Succinite (fossilized tree resin)

Organic Mineraloid

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

Chert (and Flint)

Silicon Dioxide (SiO2)

Coquina (Fossiliferous Limestone) (Coquina (Organic Clastic Limestone)) — sedimentary

Coquina (Fossiliferous Limestone)

Coquina (Organic Clastic Limestone)

Amber (Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O) — mineraloid

Amber

Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O

Pearl (Calcium carbonate (CaCO3) - mainly Aragonite) — mineral

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite

Fossiliferous Chert with Brachiopod Impression (Chert (SiO2) containing Brachiopoda fossil remains) — sedimentary

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Amber (Fossilized Resin (C10H16O)) — mineral

Amber

Fossilized Resin (C10H16O)

Chert (Arrowhead or Projectile Point) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead or Projectile Point)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Kidney Stone (Calcium Oxalate (CaC2O4), Uric Acid, or Struvite) — mineral

Kidney Stone

Calcium Oxalate (CaC2O4), Uric Acid, or Struvite

Aragonite (Aragonite (Calcium Carbonate - CaCO3)) — mineral

Aragonite

Aragonite (Calcium Carbonate - CaCO3)

Amber (Succinite) — Organic (Mineraloid)

Amber

Succinite

Organic (Mineraloid)

Amber (Succinite (Approximate formula: C10H16O)) — Mineraloid

Amber

Succinite (Approximate formula: C10H16O)

Chert (or Flint) (Chert (a cryptocrystalline variety of quartz, SiO2)) — sedimentary

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

Chert (Chert (microcrystalline quartz)) — Sedimentary

Chert

Chert (microcrystalline quartz)

Chert (Chert (microcrystalline quartz)) — sedimentary

Chert

Chert (microcrystalline quartz)

Kidney Stone (Renal Calculus) (Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O) — mineral

Kidney Stone (Renal Calculus)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Chert (Jasper-like) (SiO2 (Cryptocrystalline Quartz)) — Sedimentary

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Amethyst (Amethyst (Silicon Dioxide, SiO2 + Fe)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe)

Amber (Rough Baltics/Beach Specimen) (Succinicum (Organic Gemstone - Fossilized Resin)) — mineral

Amber (Rough Baltics/Beach Specimen)

Succinicum (Organic Gemstone - Fossilized Resin)

Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image) (SiO₂ (silicon dioxide)) — Sedimentary

Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)

SiO₂ (silicon dioxide)

Nacre (Mother of Pearl) (Nacre (Biogenic Aragonite/Calcite composite, CaCO3)) — mineral

Nacre (Mother of Pearl)

Nacre (Biogenic Aragonite/Calcite composite, CaCO3)

Slate (Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.) — sedimentary

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

Aragonite (Onyx Marble) (Aragonite / Calcium Carbonate (CaCO3)) — mineral

Aragonite (Onyx Marble)

Aragonite / Calcium Carbonate (CaCO3)