Rock Identifier

Category

Sedimentary (Biogenic Sediment Or Biological Remain)

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

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral
Chert / Flint (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline Quartz (SiO2)

sedimentary
Chalcedony (Agate/Carnelian variant) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

mineral
Ferruginous Chert (Silicon dioxide with iron oxide impurities (SiO2 + Fe2O3)) — sedimentary

Ferruginous Chert

Silicon dioxide with iron oxide impurities (SiO2 + Fe2O3)

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

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Specular Hematite (Iron Ore) (Iron(III) oxide (Fe2O3)) — mineral

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

mineral
Barite (Desert Rose or Cockscomb variety) (Barium Sulfate (BaSO4)) — mineral

Barite (Desert Rose or Cockscomb variety)

Barium Sulfate (BaSO4)

mineral
Chalcedony (Common Agate pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

mineral
Ruby in Kyanite (Corundum in Disthene (Al2SiO5 + Al2O3)) — metamorphic

Ruby in Kyanite

Corundum in Disthene (Al2SiO5 + Al2O3)

metamorphic
Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Red Jasper variety)

Silicon Dioxide (SiO2)

sedimentary
Green Chalcedony (Silicon Dioxide (SiO2) with trace minerals) — mineral

Green Chalcedony

Silicon Dioxide (SiO2) with trace minerals

mineral
Chalcedony (specifically Agate or Carnelian variety) (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony (specifically Agate or Carnelian variety)

Cryptocrystalline Silica (SiO2)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Graphite (Graphite (Carbon, C)) — metamorphic

Graphite

Graphite (Carbon, C)

metamorphic
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

mineral
Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral
Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic
Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

mineral
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Pyrite in Shale (Iron Disulfide (FeS2)) — mineral

Pyrite in Shale

Iron Disulfide (FeS2)

mineral
Potassium Feldspar and Quartz (KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)) — mineral

Potassium Feldspar and Quartz

KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

mineral
Agate with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

mineral
Hematite (Iron Ore) (Hematite (alpha-Fe2O3)) — mineral

Hematite (Iron Ore)

Hematite (alpha-Fe2O3)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary
Aragonite (Banded Calcite / 'Mexican Onyx') (Aragonite (Calcium Carbonate - CaCO3)) — mineral

Aragonite (Banded Calcite / 'Mexican Onyx')

Aragonite (Calcium Carbonate - CaCO3)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Satin Spar Selenite (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Calcium Sulfate Dihydrate (CaSO4·2H2O)

mineral
Quartz (Silicon dioxide (SiO2)) — Mineral

Quartz

Silicon dioxide (SiO2)

Mineral
Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate)

Silicon Dioxide (SiO2)

mineral
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Dendritic Agate or Tree Agate (Silicon Dioxide (SiO2) with impurities of manganese or iron oxide) — mineral

Dendritic Agate or Tree Agate

Silicon Dioxide (SiO2) with impurities of manganese or iron oxide

mineral
Sandstone (Calcareous or Ferruginous) (Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

sedimentary
Chert (Nodule) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

sedimentary
Sandstone (Quartzite-rich Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

sedimentary