Rock Identifier

Category

Sedimentary (Chemically Precipitated)

Browse sedimentary (chemically precipitated) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Chemically Precipitated) in the encyclopedia

Sinter

Ferruginous Sandstone (Sandstone (arenite) with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Ironstone Concretion (Moqui Marble) (Ironstone concretion (Fe2O3 with a sandstone core)) — sedimentary

Ironstone Concretion (Moqui Marble)

Ironstone concretion (Fe2O3 with a sandstone core)

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

Quartz (Pebble)

Silicon Dioxide (SiO2)

Banded calcite (travertine-like carbonate) (Calcite, CaCO₃; likely banded limestone or cave travertine) — sedimentary

Banded calcite (travertine-like carbonate)

Calcite, CaCO₃; likely banded limestone or cave travertine

Jasper and Quartz Breccia (Silicified Breccia (SiO2)) — sedimentary

Jasper and Quartz Breccia

Silicified Breccia (SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation (predominantly Hematite and Chert)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite and Chert)

Banded Iron Formation (Jaspilite) (Banded Iron Formation (BIF); predominantly Hematite (Fe2O3) and Magnetite (Fe3O4) with Chert/Jasper (SiO2)) — sedimentary

Banded Iron Formation (Jaspilite)

Banded Iron Formation (BIF); predominantly Hematite (Fe2O3) and Magnetite (Fe3O4) with Chert/Jasper (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Ferruginous Sandstone (ironstone) (Sandstone with iron oxide cement (limonite/hematite)) — sedimentary

Ferruginous Sandstone (ironstone)

Sandstone with iron oxide cement (limonite/hematite)

Red Chert (Jasper) (Cryptocrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Red Chert (Jasper)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Limonite/Ironstone (Limonite (Hydrous ferric oxides), FeO(OH)·nH2O) — sedimentary

Limonite/Ironstone

Limonite (Hydrous ferric oxides), FeO(OH)·nH2O

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Septarian (Dragon Stone) (Septarian concretion (Calcite, Aragonite, and Limestone)) — sedimentary

Septarian (Dragon Stone)

Septarian concretion (Calcite, Aragonite, and Limestone)

Fluorite, Turquoise, and Calcite set (Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)) — mineral

Fluorite, Turquoise, and Calcite set

Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)

Sandstone with Iron Oxide (Arenite (SiO2 with Fe2O3 inclusions)) — sedimentary

Sandstone with Iron Oxide

Arenite (SiO2 with Fe2O3 inclusions)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone with Lichen (Arenite (SiO2 based) with biological weathering) — sedimentary

Sandstone with Lichen

Arenite (SiO2 based) with biological weathering

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Limonite (often after Hematite or Goethite) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (often after Hematite or Goethite)

Limonite (FeO(OH)·nH2O)

Sandstone (Ferruginous) (Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)

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

Chert (Red Jasper variant)

Microcrystalline Quartz (SiO2)

Sandstone (with Iron Oxide) (Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)) — sedimentary

Sandstone (with Iron Oxide)

Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon dioxide (SiO2)

Flint (variety of Chert) (Silicon Dioxide (SiO2)) — sedimentary

Flint (variety of Chert)

Silicon Dioxide (SiO2)

Chert (Jasper) (Microcrystalline Quartz (SiO2) with Iron Oxide impurities) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2) with Iron Oxide impurities

Chert Arrowhead (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Botryoidal calcite (likely calcite concretion) (Calcite, calcium carbonate (CaCO₃)) — mineral

Botryoidal calcite (likely calcite concretion)

Calcite, calcium carbonate (CaCO₃)

Quartzite Geode (unopened) (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite Geode (unopened)

SiO2 (Silicon Dioxide)

Carnelian (Carnelian (variety of Chalcedony, SiO2)) — mineral

Carnelian

Carnelian (variety of Chalcedony, SiO2)

Amethyst Geode (Silicon Dioxide with trace inclusions of Iron (SiO2)) — mineral

Amethyst Geode

Silicon Dioxide with trace inclusions of Iron (SiO2)

Quartz Geode (Crystalline Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Geode

Crystalline Quartz (Silicon Dioxide, SiO2)

Jasper (Silica (SiO2) with impurities) — Sedimentary/Mineral

Jasper

Silica (SiO2) with impurities

Sedimentary/Mineral

Weathered Quartzite or Chert Pebble (Silicon Dioxide (SiO2)) — metamorphic or sedimentary

Weathered Quartzite or Chert Pebble

Silicon Dioxide (SiO2)

metamorphic or sedimentary

Weathered Sandstone Cobble (Arenite / Quartz Sandstone) — sedimentary

Weathered Sandstone Cobble

Arenite / Quartz Sandstone

Sandstone and Quartzite Specimens (SiO2 with varying mineral/clastic inclusions) — sedimentary/metamorphic

Sandstone and Quartzite Specimens

SiO2 with varying mineral/clastic inclusions

sedimentary/metamorphic

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Turquoise Beads (CuAl6(PO4)4(OH)8·4H2O) — gemstone

Turquoise Beads

CuAl6(PO4)4(OH)8·4H2O

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

Flint / Chert

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2 with Fe2O3 inclusions)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2 with Fe2O3 inclusions)