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

Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Baryte (Barite) (Barium sulfate (BaSO4)) — mineral

Baryte (Barite)

Barium sulfate (BaSO4)

Quartz Geode (with Calcite influence) (Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)) — mineral

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Geode (unopened) or Calcareous Nodule (Siliceous or Calcareous Concretion/Nodule) — sedimentary

Geode (unopened) or Calcareous Nodule

Siliceous or Calcareous Concretion/Nodule

Chert (or potentially Jasper/Chalcedony) (SiO2 (Silicon Dioxide)) — sedimentary

Chert (or potentially Jasper/Chalcedony)

SiO2 (Silicon Dioxide)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Smooth River Stone) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Stone)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Shale with Quartz Veins (Fissile Sedimentary Rock (SiO2)) — sedimentary

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

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

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Red Jasper or Ironstone concretion (SiO2 or Fe2O3) — sedimentary or mineral

Red Jasper or Ironstone concretion

SiO2 or Fe2O3

sedimentary or mineral

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Geode (Silicon Dioxide (SiO2) in Host Rock) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Green Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Green Opal

Hydrated Silica (SiO2·nH2O)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

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

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Agate (Beads) (Silicon Dioxide (SiO2)) — mineral

Agate (Beads)

Silicon Dioxide (SiO2)

Weathered iron-rich rock, possibly limonite-bearing quartzite or altered basalt (Indeterminate; likely quartz (SiO₂) with iron oxides/hydroxides such as limonite/goethite) — mineral

Weathered iron-rich rock, possibly limonite-bearing quartzite or altered basalt

Indeterminate; likely quartz (SiO₂) with iron oxides/hydroxides such as limonite/goethite

Chert (Sea-worn Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Sea-worn Pebble)

Microcrystalline Quartz (SiO2)

Chert (variations like Flint or Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations like Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

Chert (Microcrystalline or cryptocrystalline quartz) — sedimentary

Chert

Microcrystalline or cryptocrystalline quartz

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

Quartz (Grain)

Silicon Dioxide (SiO2)

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

Chert (with Iron Staining)

Silicon Dioxide (SiO2)

Milky quartz crystal cluster (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz crystal cluster

Quartz, silicon dioxide (SiO₂)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Chert Pebble (Jasper/Flint variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

Chert (Yellow/Tan variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow/Tan variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2)) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

Tumbled chert or flint pebble (Microcrystalline quartz (SiO₂), likely chert; exact variety uncertain from the image) — sedimentary

Tumbled chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert; exact variety uncertain from the image

Aragonite (Flos Ferri) (Calcium Carbonate (CaCO3)) — mineral

Aragonite (Flos Ferri)

Calcium Carbonate (CaCO3)

Chert (with Calcite layering) (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)) — sedimentary

Chert (with Calcite layering)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Weathered stone, likely sandstone or altered volcanic rock (Indeterminate; possibly quartz-rich sandstone or weathered tuff) — sedimentary

Weathered stone, likely sandstone or altered volcanic rock

Indeterminate; possibly quartz-rich sandstone or weathered tuff