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

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Sinter

Sinter

Banded Chert in Matrix (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

sedimentary
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Tumbled yellow chalcedony (likely citrine or yellow quartz) (Quartz, SiO₂; potentially microcrystalline chalcedony) — mineral

Tumbled yellow chalcedony (likely citrine or yellow quartz)

Quartz, SiO₂; potentially microcrystalline chalcedony

mineral
Geode (Unopened Keokuk Geode) (Silicon Dioxide (SiO2) - Chalcedony / Quartz exterior) — mineral

Geode (Unopened Keokuk Geode)

Silicon Dioxide (SiO2) - Chalcedony / Quartz exterior

mineral
Red Jasper and Mookaite Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper and Mookaite Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

mineral
Quartz Geode (Crystalline Silicon Dioxide (SiO2) in a Geodic Concretion) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geodic Concretion

mineral
Quartz Geode with Iron Staining (Silicon Dioxide (SiO2) with Limonite/Hematite inclusions) — mineral

Quartz Geode with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Common variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common variant)

Silicon Dioxide (SiO2)

mineral
Quartz Pebble (Geode-like) (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble (Geode-like)

Silicon Dioxide (SiO2)

Mineral
Quartz (Clear Quartz/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Pyrite on Quartz (Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite on Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

mineral
Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

mineral
Pink Opal (Common Opal) (Amorphous Hydrated Silica (SiO2·nH2O)) — mineral

Pink Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O)

mineral
Amethyst Geode (Amethyst (Silicon Dioxide), Formula: SiO2) — mineral

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

mineral
Limonite Ironstone (Goethite-Limonite concretion / Iron oxide) — sedimentary

Limonite Ironstone

Goethite-Limonite concretion / Iron oxide

sedimentary
Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Calcite on Limestone (Calcium Carbonate (CaCO3)) — mineral

Calcite on Limestone

Calcium Carbonate (CaCO3)

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

Chert (Flint / Chalcedony)

Silicon Dioxide (SiO2)

sedimentary
Jasper / Chert (Iron-stained Quartz) (SiO2 (Silicon Dioxide with Iron Oxide inclusions)) — sedimentary

Jasper / Chert (Iron-stained Quartz)

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

sedimentary
Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

sedimentary
Chert (Jasper/Quartzite variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Quartzite variant)

Silicon Dioxide (SiO2)

sedimentary
Chert Arrowhead (Jasper) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert Arrowhead (Jasper)

Chert (Cryptocrystalline Quartz, SiO2)

sedimentary
Red Jasper with Quartz (Opaque microcrystalline Quartz (SiO2) with Hematite inclusions) — sedimentary

Red Jasper with Quartz

Opaque microcrystalline Quartz (SiO2) with Hematite inclusions

sedimentary
Chert (often called Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline quartz (SiO2)

sedimentary
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Chert (Jasper/Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

sedimentary
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (SiO2)

sedimentary
Chert (Quartz Variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Quartz Variety)

Silicon Dioxide (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

sedimentary
Chert (Jasper/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

sedimentary
Chert (Jasper/Flint variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Chert (Silicon dioxide (SiO2) - Microcrystalline quartz) — Sedimentary

Chert

Silicon dioxide (SiO2) - Microcrystalline quartz

Sedimentary