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 Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Aragonite (Aragonite (CaCO3)) — mineral

Aragonite

Aragonite (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Blue Aragonite (polished) (Aragonite (CaCO3)) — mineral

Blue Aragonite (polished)

Aragonite (CaCO3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Chert / Flint Nodules in Limestone (Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert / Flint Nodules in Limestone

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Quartz pebble with a conchoidal chip (Silicon dioxide (SiO2)) — mineral

Quartz pebble with a conchoidal chip

Silicon dioxide (SiO2)

Tumbled banded iron formation (jasper-rich ironstone) (Banded iron formation, commonly hematite/magnetite with microcrystalline quartz (SiO₂)) — sedimentary

Tumbled banded iron formation (jasper-rich ironstone)

Banded iron formation, commonly hematite/magnetite with microcrystalline quartz (SiO₂)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Orange Calcite with Siderite/Iron Oxide Coating (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite with Siderite/Iron Oxide Coating

Calcium Carbonate (CaCO3)

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony (Quartz (SiO₂), potentially microcrystalline quartz (chalcedony)) — mineral

Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony

Quartz (SiO₂), potentially microcrystalline quartz (chalcedony)

Weathered quartz-rich river stone (Chert or silicified limestone/quartzite; exact identification requires testing) — sedimentary

Weathered quartz-rich river stone

Chert or silicified limestone/quartzite; exact identification requires testing

Pink Dyed Agate (Silicon Dioxide (SiO2) with artificial pigment) — sedimentary

Pink Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Dyed Blue Agate Slice (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Dyed Blue Agate Slice

Chalcedony (Silicon Dioxide, SiO2)

Quartz (SiO2 (Silicon Dioxide)) — mineral

Quartz

SiO2 (Silicon Dioxide)

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Green Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Yellow Chalcedony (Agate/Chert) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Yellow Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Banded Sandstone (Liesegang Rings) (Sedimentary sandstone with Iron oxide precipitates) — sedimentary

Banded Sandstone (Liesegang Rings)

Sedimentary sandstone with Iron oxide precipitates

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Septarian Nodule (Septarian Concretion (CaCO3 with Calcite/Aragonite and Clay/Mudstone)) — sedimentary

Septarian Nodule

Septarian Concretion (CaCO3 with Calcite/Aragonite and Clay/Mudstone)

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

Jasper / Chert (polished)

Microcrystalline Quartz (SiO2)

sedimentary / mineral

Celestite (Celestine) (Strontium Sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper Beads (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Beads

Microcrystalline Quartz (SiO2)

Dalmation Stone (Dalmation Jasper) (Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)) — igneous

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Likely bituminous coal or carbon-rich shale fragment (Bituminous coal; predominantly carbon with macerals and minor clay/pyrite) — sedimentary

Likely bituminous coal or carbon-rich shale fragment

Bituminous coal; predominantly carbon with macerals and minor clay/pyrite

Tumbled metallic sulfide mineral, likely pyrite (Pyrite (FeS₂), tentatively; possibly marcasite or a pyrite-rich nodule) — mineral

Tumbled metallic sulfide mineral, likely pyrite

Pyrite (FeS₂), tentatively; possibly marcasite or a pyrite-rich nodule

Rounded quartz-rich pebble (Milky quartz or quartzite; predominantly silicon dioxide (SiO₂)) — sedimentary

Rounded quartz-rich pebble

Milky quartz or quartzite; predominantly silicon dioxide (SiO₂)

Hematitic Sandstone (Sandstone with Iron Oxide (Hematite) staining) — sedimentary

Hematitic Sandstone

Sandstone with Iron Oxide (Hematite) staining