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.

Learn about Sedimentary (With Some Aspects Of Mineral Replacement) in the encyclopedia

Coal

Claystone

Shale

Marl

Black Shale

Super Seven

Rock Salt

Anatase

Limestone

Siltstone

Pisolite

Bituminous Shale

Bituminous Shale

Fern fossil in shale (Plant fossil, likely a fern frond impression preserved in fine-grained shale; exact species indeterminable from the image) — fossil

Fern fossil in shale

Plant fossil, likely a fern frond impression preserved in fine-grained shale; exact species indeterminable from the image

Chert (Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Sandstone concretion (Arenite sedimentary rock (concretion/nodule)) — sedimentary

Sandstone concretion

Arenite sedimentary rock (concretion/nodule)

Mixed mineral and rock collection, including likely amethyst and assorted tumbled stones (Unidentified mixed specimens; visible purple quartz is likely amethyst (SiO₂)) — mineral

Mixed mineral and rock collection, including likely amethyst and assorted tumbled stones

Unidentified mixed specimens; visible purple quartz is likely amethyst (SiO₂)

Hematite bead bracelet (Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads) — mineral

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads

Fossilized bone fragment (Mineral-replaced vertebrate bone, commonly apatite [Ca₅(PO₄)₃(F,OH,Cl)]) — fossil

Fossilized bone fragment

Mineral-replaced vertebrate bone, commonly apatite [Ca₅(PO₄)₃(F,OH,Cl)]

Fossilized Bone (Petrified Bone) (Permineralized Vertebrate Remains) — sedimentary

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

Fluorite (Fluorite (CaF₂)) — mineral

Fluorite

Fluorite (CaF₂)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement)

Gneiss with Quartz Veining (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Fossil trilobite (Trilobita (likely a spiny or enrolled trilobite; exact genus unclear)) — fossil

Fossil trilobite

Trilobita (likely a spiny or enrolled trilobite; exact genus unclear)

Chert (Lithic flake / Arrowhead fragment) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Lithic flake / Arrowhead fragment)

Microcrystalline Quartz (SiO2)

Fossiliferous Chert with Brachiopod Impression (Chert (SiO2) containing Brachiopoda fossil remains) — sedimentary

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Granitic Gneiss (Gneiss (quartz-feldspar-mica complex)) — metamorphic

Granitic Gneiss

Gneiss (quartz-feldspar-mica complex)

Geode (Quartz chalcedony variety) (SiO2 (Silicon Dioxide)) — sedimentary

Geode (Quartz chalcedony variety)

SiO2 (Silicon Dioxide)

Tumbled septarian nodule fragment (probable) (Septarian calcite–aragonite concretion with brown clay/mudstone matrix) — sedimentary

Tumbled septarian nodule fragment (probable)

Septarian calcite–aragonite concretion with brown clay/mudstone matrix

Hematite / Jasper (Iron(III) oxide (Fe2O3) in Quartz (SiO2)) — mineral / sedimentary

Hematite / Jasper

Iron(III) oxide (Fe2O3) in Quartz (SiO2)

mineral / sedimentary

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

Chert (Flint)

Silicon Dioxide (SiO2)

Hematite (Iron Ore) (Hematite (Fe2O3)) — mineral

Hematite (Iron Ore)

Hematite (Fe2O3)

Chert (Arrowhead Artifact) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead Artifact)

Microcrystalline Quartz (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

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

Flint / Chert

Silicon Dioxide (SiO2)

Weathered jasper or iron-stained quartzite (Silicified quartz-rich rock, primarily microcrystalline quartz (SiO₂) with iron-oxide/hydroxide staining) — metamorphic

Weathered jasper or iron-stained quartzite

Silicified quartz-rich rock, primarily microcrystalline quartz (SiO₂) with iron-oxide/hydroxide staining

Rounded gray stone, likely weathered chert or quartz-rich river pebble (Chert (microcrystalline SiO₂), tentative) — sedimentary

Rounded gray stone, likely weathered chert or quartz-rich river pebble

Chert (microcrystalline SiO₂), tentative

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

Chert Nodules

Chert (Silicon Dioxide, SiO2)

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Flint (Silicon dioxide (Microcrystalline quartz, SiO2)) — sedimentary

Flint

Silicon dioxide (Microcrystalline quartz, SiO2)

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Flint / Chert (Microcrystalline quartz (SiO2)) — sedimentary

Flint / Chert

Microcrystalline quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Flint / Chert Arrowhead

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Flint) (Chert (Microcrystalline or cryptocrystalline Silica, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline or cryptocrystalline Silica, SiO2)

Chert (Common Opal/Chalcedony mixture) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Common Opal/Chalcedony mixture)

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper) (Spherulitic Chalcedony (SiO2)) — sedimentary

Ocean Jasper (Orbicular Jasper)

Spherulitic Chalcedony (SiO2)

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

Chert (Flint flake)

Microcrystalline Quartz (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Goniatite Fossil (Order Goniatitida) — fossil

Goniatite Fossil

Order Goniatitida

Yellow Chert or Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert or Jasper

Silicon Dioxide (SiO2)