Rock Identifier

Category

Sedimentary (Chemically Precipitated)

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

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Hematite with Magnetite (Iron Oxide (Fe2O3)) — mineral

Hematite with Magnetite

Iron Oxide (Fe2O3)

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

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Quartz (Drusy/Crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Drusy/Crystalline variety)

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

Quartz Geode (Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Water-worn)

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Concrete Paver (Artificial Cementitious Rock) (Hydrated Portland Cement Aggregate) — Sedimentary (Synthetic)

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Sedimentary (Synthetic)

Clear Quartz (or Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Banded Iron Formation (BIF) (Banded Iron Formation) — Sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation

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

Chert (Jasper/Brown Chert)

Silicon Dioxide (SiO2)

Chert (specifically Chert Nodule/Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (specifically Chert Nodule/Flint)

Chert (Silicon Dioxide, SiO2)

Chert (vuggy variety) (Microcrystalline silica (SiO2)) — sedimentary

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Chert (Jasper/River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/River Pebble)

Silicon Dioxide (SiO2)

Chert / Flint (with Iron Staining) (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint (with Iron Staining)

Silicon Dioxide (SiO2)

Chert (River Stone/Pebble) (Chert (SiO2)) — sedimentary

Chert (River Stone/Pebble)

Chert (SiO2)

Blue Agate (Dyed) (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Blue Agate (Dyed)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Quartzite Pebble (River Rock) (Metamorphic Quartzite (predominantly SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Gold Ore (Native Gold (Au)) — mineral

Gold Ore

Native Gold (Au)

Chert (Brown Variety) (Silicon dioxide (SiO2)) — sedimentary

Chert (Brown Variety)

Silicon dioxide (SiO2)

Chert (Iron-stained) (Chert (SiO2 - Silicon Dioxide)) — sedimentary

Chert (Iron-stained)

Chert (SiO2 - Silicon Dioxide)

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

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

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

Chert (White Flint)

Silicon Dioxide (SiO2)

Jasper (Red and Tan Jasper) (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Red and Tan Jasper)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Orange Calcite (Cleavage Rhomb) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Orange Calcite (Cleavage Rhomb)

Calcite (Calcium Carbonate, CaCO3)

Quartzite Pebble (River Rock) (Quartzite (mainly SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Quartzite (mainly SiO2)

Limonite (Ironstone Concretion) (Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)) — sedimentary

Limonite (Ironstone Concretion)

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

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)) — sedimentary

Limestone

Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)

Red Howlite (Dyed) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye) — mineral

Red Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye

Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Tan/Grey) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Tan/Grey)

Chert (Silicon Dioxide, SiO2)

Chert (with Quartz veins) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (with Quartz veins)

Microcrystalline quartz (SiO2)

Chert (Golden/Yellow Variety) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Golden/Yellow Variety)

Microcrystalline Silica (SiO2)

Chert (often called Flint) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)