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

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood / Chalcedony (SiO2)) — sedimentary

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood / Chalcedony (SiO2)

Chert (Flint) with Limonite Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) with Limonite Staining

Microcrystalline Quartz (SiO2)

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

Chert / Jasper

Silicon Dioxide (SiO2)

Chalcedony Pebble (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Jasper (Jasper (SiO2)) — sedimentary

Jasper

Jasper (SiO2)

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Fossil scallop shell (Pectinid bivalve fossil; likely a scallop (family Pectinidae), exact genus/species uncertain) — fossil

Fossil scallop shell

Pectinid bivalve fossil; likely a scallop (family Pectinidae), exact genus/species uncertain

Hematite (Botryoidal/Kidney Ore) (Iron(III) oxide (Fe2O3)) — mineral

Hematite (Botryoidal/Kidney Ore)

Iron(III) oxide (Fe2O3)

Chalcedony Nodule (Commonly known as Agate or Chert) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

Magnetite (Lodestone variety) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Jasper-Agate (Iron-stained Quartz) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper-Agate (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Fossilized Bone (Fossilized Vertebrate Bone (Per mineralized)) — fossil

Fossilized Bone

Fossilized Vertebrate Bone (Per mineralized)

Fossil bivalve shell (Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features) — fossil

Fossil bivalve shell

Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features

Fossil Coral (Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)) — fossil

Fossil Coral

Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Red Sandstone (Arenite (high iron oxide content)) — sedimentary

Red Sandstone

Arenite (high iron oxide content)

Fossil bone fragment (likely vertebrate bone) (Fossilized vertebrate bone; exact taxon indeterminate from the photograph) — fossil

Fossil bone fragment (likely vertebrate bone)

Fossilized vertebrate bone; exact taxon indeterminate from the photograph

Sandstone Pebble (Arenite) — sedimentary

Sandstone Pebble

Arenite

Ammonite Fossil (Ammonoidea (subclass)) — sedimentary

Ammonite Fossil

Ammonoidea (subclass)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Quartz-bearing sulfide ore, possibly pyrite in altered host rock (Likely pyrite (FeS₂) with quartz and possibly calcite or carbonate gangue; exact identification requires testing) — mineral

Quartz-bearing sulfide ore, possibly pyrite in altered host rock

Likely pyrite (FeS₂) with quartz and possibly calcite or carbonate gangue; exact identification requires testing

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

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

Chert (Cherty Limestone / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (Jasper (Cryptocrystalline Quartz; SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Pyrite (on Quartz/Host Rock) (Iron Sulfide (FeS₂)) — mineral

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Chert (with Patina) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Patina)

Microcrystalline Quartz (SiO2)

Polished orbicular jasper (Jasper, microcrystalline quartz (SiO₂), with iron oxides and altered volcanic inclusions) — metamorphic

Polished orbicular jasper

Jasper, microcrystalline quartz (SiO₂), with iron oxides and altered volcanic inclusions

Orbicular jasper (orbicular chert/jasper) (Silica-rich microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions) — sedimentary

Orbicular jasper (orbicular chert/jasper)

Silica-rich microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions

Magnetite / Ironstone (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite / Ironstone

Iron(II,III) oxide (Fe3O4)

Yellow Jasper (Quartz (Silicon Dioxide, SiO2 with impurities)) — sedimentary

Yellow Jasper

Quartz (Silicon Dioxide, SiO2 with impurities)

Chert (varieties include Flint and Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled black stone, likely basalt or black jasper (Likely fine-grained basalt (plagioclase–pyroxene); exact identification requires testing) — igneous

Tumbled black stone, likely basalt or black jasper

Likely fine-grained basalt (plagioclase–pyroxene); exact identification requires testing

Fossil bivalve shell, likely oyster or related mollusk (Fossilized oyster-like bivalve; exact genus and age cannot be determined from the photograph) — fossil

Fossil bivalve shell, likely oyster or related mollusk

Fossilized oyster-like bivalve; exact genus and age cannot be determined from the photograph

Sandstone with Iron Staining (Clastic sedimentary rock (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone with Iron Staining

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Fossilized Brachiopod (Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)) — sedimentary

Fossilized Brachiopod

Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)

Fossilized bone, likely a large vertebrate limb or rib fragment (Petrified bone; exact taxon indeterminate from the image) — fossil

Fossilized bone, likely a large vertebrate limb or rib fragment

Petrified bone; exact taxon indeterminate from the image

Pyrite (fool’s gold) (Iron disulfide, FeS₂; commonly cubic or pyritohedral crystals) — mineral

Pyrite (fool’s gold)

Iron disulfide, FeS₂; commonly cubic or pyritohedral crystals

Dyed, polished stone—possibly rhodonite or pink jasper (Likely rhodonite (MnSiO₃) or manganese-rich jasper; exact identification requires testing) — mineral

Dyed, polished stone—possibly rhodonite or pink jasper

Likely rhodonite (MnSiO₃) or manganese-rich jasper; exact identification requires testing

Sandstone (Sandstone (SiO2-dominated clastic rock)) — sedimentary

Sandstone

Sandstone (SiO2-dominated clastic rock)