Rock Identifier

Category

Sedimentary Mineral

Browse sedimentary mineral specimens identified by the Rock Identifier community.

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

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

Red Jasper

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Banded Calcite (often sold as 'Green Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Yellow Jasper (Tectosilicates (SiO2) with Goethite/Iron oxide inclusions) — sedimentary

Yellow Jasper

Tectosilicates (SiO2) with Goethite/Iron oxide inclusions

Banded Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Chert Geode or Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Geode or Nodule

Microcrystalline Quartz (SiO2)

Ironstone Concretion (Ironstone Gourd) (Limonite/Goethite Concretion (FeOO(H))) — sedimentary

Ironstone Concretion (Ironstone Gourd)

Limonite/Goethite Concretion (FeOO(H))

Bloodstone (Heliotrope) (Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite) — sedimentary

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite

Geode (unopened) (Chert / Chalcedony Geode (SiO2)) — sedimentary

Geode (unopened)

Chert / Chalcedony Geode (SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Fossil Shell (Bivalve) (Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3) — sedimentary

Fossil Shell (Bivalve)

Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3

Orbicular Jasper (Eye Jasper / Kambaba-like pattern) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Orbicular Jasper (Eye Jasper / Kambaba-like pattern)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Chalcedony in Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Dragon Stone (Ohko Stone (Argillaceous sedimentary rock)) — sedimentary

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Chert (Chert Pebble) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chert Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Druzy Quartz on Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Gritstone) (Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)) — sedimentary

Ferruginous Sandstone (Gritstone)

Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)

River Rock (Sedimentary Rock (various compositions)) — sedimentary

River Rock

Sedimentary Rock (various compositions)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) - variety of Chalcedony) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal

Hydrated Silica (SiO2·nH2O)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Dragon Stone (Argillaceous Sedimentary Rock (Ohko Stone)) — sedimentary

Dragon Stone

Argillaceous Sedimentary Rock (Ohko Stone)

Banded Calcite (often sold as Yellow Aragonite or Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often sold as Yellow Aragonite or Onyx)

Calcium Carbonate (CaCO3)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Ironstone Concretion (Boji Stone/Moqui Marble type) (Goethite/Hematite-encrusted Sandstone Concretion) — sedimentary

Ironstone Concretion (Boji Stone/Moqui Marble type)

Goethite/Hematite-encrusted Sandstone Concretion

Picture Jasper (Jasper (Silicon Dioxide, SiO2 with impurities)) — sedimentary

Picture Jasper

Jasper (Silicon Dioxide, SiO2 with impurities)

Geode with Quartz Crystal Cavity (Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix) — sedimentary

Geode with Quartz Crystal Cavity

Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix

Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2) — Mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade regional metamorphic rock)

Calcite (Calcite (CaCO3)) — mineral

Calcite

Calcite (CaCO3)

Limonite Pseudomorph after Pyrite (Limonite (Hydrous iron oxides, FeO(OH)·nH2O) replacing Pyrite (FeS2)) — mineral

Limonite Pseudomorph after Pyrite

Limonite (Hydrous iron oxides, FeO(OH)·nH2O) replacing Pyrite (FeS2)

Petrified Wood (Silicified Wood (primarily SiO₂ / Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)