Rock Identifier

Category

Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.

Basalt River Pebble (Mafic Igneous Rock (Fine-grained Basalt)) — igneous

Basalt River Pebble

Mafic Igneous Rock (Fine-grained Basalt)

igneous
Veined Limestone (Micrite) with Quartz/Calcite Veins (Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions) — sedimentary

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

sedimentary
Banded Agate (specifically Eye Agate / Chalcedony) (Agate (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Banded Agate (specifically Eye Agate / Chalcedony)

Agate (Cryptocrystalline variety of Quartz, SiO2)

mineral
Granite Cobble (Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)) — igneous

Granite Cobble

Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)

igneous
Basalt (Amygdaloidal) (Amygdaloidal Basalt) — igneous

Basalt (Amygdaloidal)

Amygdaloidal Basalt

igneous
Limonitic Sandstone (Stained Sandstone) (Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining) — sedimentary

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

sedimentary
Stichtite in Serpentine (Atlantisite) (Mg6Cr2CO3(OH)16·4H2O (Stichtite) / Mg3Si2O5(OH)4 (Serpentine)) — metamorphic

Stichtite in Serpentine (Atlantisite)

Mg6Cr2CO3(OH)16·4H2O (Stichtite) / Mg3Si2O5(OH)4 (Serpentine)

metamorphic
K2 Stone (or K2 Jasper) (Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)) — igneous

K2 Stone (or K2 Jasper)

Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)

igneous
Bauxite (Bauxite (Al2O3·nH2O)) — sedimentary

Bauxite

Bauxite (Al2O3·nH2O)

sedimentary
Granite Pebble (Granite (Phaneritic Acidic Igneous Rock)) — igneous

Granite Pebble

Granite (Phaneritic Acidic Igneous Rock)

igneous
Blue Sapphire (Corundum (Al2O3 with trace amounts of iron and titanium)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

mineral
River Pebble (Likely Quartzite or Gneiss) (Metamorphosed Silicate Rock (primarily SiO2)) — metamorphic

River Pebble (Likely Quartzite or Gneiss)

Metamorphosed Silicate Rock (primarily SiO2)

metamorphic
Jasper (likely Polychrome or Mookaite variants) (Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions) — sedimentary (chemically precipitated)

Jasper (likely Polychrome or Mookaite variants)

Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions

sedimentary (chemically precipitated)
Basalt (Water-worn pebble) (Basalt (Aphanitic mafic volcanic rock)) — igneous

Basalt (Water-worn pebble)

Basalt (Aphanitic mafic volcanic rock)

igneous
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

sedimentary
Bauxite (Bauxite (Mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

sedimentary
Chalcanthite (Likely Synthetic/Lab-Grown) (Hydrated copper(II) sulfate (CuSO4·5H2O)) — mineral

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

mineral
Quartz (Quartz (SiO2 - Silicon Dioxide)) — Mineral, often found as detrital grains in sedimentary rocks

Quartz

Quartz (SiO2 - Silicon Dioxide)

Mineral, often found as detrital grains in sedimentary rocks
Sandstone (Ferruginous) (Arenite (Fe-rich SiO2)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

sedimentary
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Variscite in Matrix (Variscite (AlPO4 · 2H2O)) — mineral

Variscite in Matrix

Variscite (AlPO4 · 2H2O)

mineral
Carnelian (SiO2 (Silicon Dioxide), a variety of Chalcedony) — mineral

Carnelian

SiO2 (Silicon Dioxide), a variety of Chalcedony

mineral
Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Granite Pebble (Intrusive Felsic Igneous Rock (primarily SiO2 with Al2O3, K2O, Na2O)) — igneous

Granite Pebble

Intrusive Felsic Igneous Rock (primarily SiO2 with Al2O3, K2O, Na2O)

igneous
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Limonite Concretion (Goethite-rich Concretion (FeO(OH))) — sedimentary

Limonite Concretion

Goethite-rich Concretion (FeO(OH))

sedimentary
Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

mineral
Granite (Weathered River Rock) (Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite (Weathered River Rock)

Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)

igneous
Quartz (Quartz (Silicon Dioxide - SiO2)) — Mineral

Quartz

Quartz (Silicon Dioxide - SiO2)

Mineral
Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

sedimentary
Magnetite Sand (Black Sand) (Magnetite (Fe3O4)) — mineral

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

mineral
Turquoise and Hematite (CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)) — mineral

Turquoise and Hematite

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)

mineral
Sandstone (Ferruginous) (Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
River Pebble (Gabbro or Dark Sandstone variety) (Mafic Intrusive Rock (Plagioclase Feldspar and Pyroxene)) — igneous

River Pebble (Gabbro or Dark Sandstone variety)

Mafic Intrusive Rock (Plagioclase Feldspar and Pyroxene)

igneous
Howlite (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

mineral
Shattuckite (Blue Quartz/Jasper Matrix) (Shattuckite (Copper Silicate Hydroxide - Cu5(SiO3)4(OH)2)) — mineral

Shattuckite (Blue Quartz/Jasper Matrix)

Shattuckite (Copper Silicate Hydroxide - Cu5(SiO3)4(OH)2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (likely Milky Quartz) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Mineral
Chalcedony (Blue/Grey Lace Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Blue/Grey Lace Agate)

Silicon Dioxide (SiO2)

mineral
Sandstone concretion (Ironstone-stained) (Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)) — sedimentary

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

sedimentary