Rock Identifier

Category

Sedimentary (With Some Aspects Of Mineral Replacement)

Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.

Halite (Halite (Sodium Chloride, NaCl)) — mineral

Halite

Halite (Sodium Chloride, NaCl)

Zebra Jasper (Tetragonal Silicon Dioxide (Quartz) with impurities) — sedimentary

Zebra Jasper

Tetragonal Silicon Dioxide (Quartz) with impurities

Sandstone Concretion (Sandstone (Sedimentary Rock) with silica or calcite cement) — sedimentary

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement

Fossilized Sea Urchin (Echinoid) (Echinoidea (Fossil specimen, often replaced by Calcite or Silica)) — sedimentary

Fossilized Sea Urchin (Echinoid)

Echinoidea (Fossil specimen, often replaced by Calcite or Silica)

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

Gneiss

Gneiss (High-grade regional metamorphic rock)

Chalcedony (Moonstone variant or White Agate) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Red Jasper (Quartz (Silicon Dioxide) with Iron Oxide impurities (Fe2O3)) — mineralological specimen

Red Jasper

Quartz (Silicon Dioxide) with Iron Oxide impurities (Fe2O3)

mineralological specimen

Pyrite (Pyrite (Iron sulfide, FeS₂)) — mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Otodus obliquus) (Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)) — sedimentary (fossil)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)

sedimentary (fossil)

Chert Nodule (Commonly known as a Flint or River Cobble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (Commonly known as a Flint or River Cobble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (varietal Chalcedony or Flint) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (varietal Chalcedony or Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

Sandstone (Ferruginous) (Arenite (with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (specifically a Granitic Gneiss specimen) (Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)) — metamorphic

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye) (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)) — metamorphic

Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Sandstone (likely Fossiliferous) (Arenite / Fossiliferous Sandstone (SiO2 composition)) — sedimentary

Sandstone (likely Fossiliferous)

Arenite / Fossiliferous Sandstone (SiO2 composition)

Gneiss (High-grade foliated metamorphic rock) — metamorphic

Gneiss

High-grade foliated metamorphic rock

Gneiss (Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)) — metamorphic

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

Granite (Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)

Fossilized Coral (Petoskey Stone type) (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Fossilized Coral (Petoskey Stone type)

Hexagonaria percarinata (Fossilized Rugose Coral)

Red Sandstone (Arenite (primarily Quartz with Iron Oxide coating)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Chert (with Limonite staining) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (with Limonite staining)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert Conglomerate (or Breccia) (Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)) — sedimentary

Chert Conglomerate (or Breccia)

Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)

Chert (Flint variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Oolitic Chert (Ooidal Microcrystalline Quartz (SiO2)) — sedimentary

Oolitic Chert

Ooidal Microcrystalline Quartz (SiO2)

Chert (Chert Nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Chert Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Red Jasper

Jasper (Silicon Dioxide, SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Opal

Hydrated Silica (SiO2·nH2O)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

River Stone (Granitic Gneiss) (Foliated Granitic Gneiss) — metamorphic

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Gneiss (specifically Micaceous Gneiss) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)