Rock Identifier

Category

Mineral Within Sedimentary Rock

Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.

Ironstone Concretion / Limonite Node (Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O) with Goethite/Hematite) — sedimentary

Ironstone Concretion / Limonite Node

Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O) with Goethite/Hematite

sedimentary
Jasper (Iron-rich Chalcedony) (Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)) — Sedimentary / Metamorphic

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Sedimentary / Metamorphic
Schist (Schist (various mineral compositions)) — Metamorphic

Schist

Schist (various mineral compositions)

Metamorphic
Scoria (Red Lava Rock) (Scoria (Extrusive Igneous Rock)) — Igneous

Scoria (Red Lava Rock)

Scoria (Extrusive Igneous Rock)

Igneous
Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Mineral
Quartz (Clear / Rock Crystal) (Silicon Dioxide (SiO2)) — Mineral

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Mineral
Sandstone (Sandstone (principally SiO2)) — sedimentary

Sandstone

Sandstone (principally SiO2)

sedimentary
Amethyst (SiO2 (Silicon Dioxide with iron impurities)) — mineral

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

mineral
Amazonite (KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar) — mineral

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar

mineral
Scoria (Red Lava Rock) (Scoria) — igneous

Scoria (Red Lava Rock)

Scoria

igneous
Almandine Garnet in Schist Matrix (Almandine - Fe3Al2(SiO4)3) — metamorphic

Almandine Garnet in Schist Matrix

Almandine - Fe3Al2(SiO4)3

metamorphic
Septarian Nodule Segment (Turtle Stone) (Septarian Concretion (CaCO3 with Siderite or Calcite infill)) — sedimentary

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

sedimentary
Granite (likely a river or beach pebble) (Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)) — Igneous

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Igneous
Chalcedony (Quartz Nodule) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz Nodule)

Silicon Dioxide (SiO2)

mineral
Mica Schist (Mica Schist (primarily Muscovite and Biotite phyllosilicates)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Biotite phyllosilicates)

metamorphic
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Iridescent Ammonite (Ammonoidea (Species: likely Cleoniceras or Desmoceras); Mineral: Aragonite/Ammolite (CaCO3)) — sedimentary (fossilized)

Iridescent Ammonite

Ammonoidea (Species: likely Cleoniceras or Desmoceras); Mineral: Aragonite/Ammolite (CaCO3)

sedimentary (fossilized)
Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic
Sandstone (specifically Cross-bedded Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (specifically Cross-bedded Sandstone)

Arenite (composed primarily of SiO2)

sedimentary
Banded Gneiss (Gneiss (complex metamorphic silicate rock)) — metamorphic

Banded Gneiss

Gneiss (complex metamorphic silicate rock)

metamorphic
Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

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

Jasper

Jasper / Silicon Dioxide (SiO₂)

sedimentary
Rough Quartz (or Quartzite pebble) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (or Quartzite pebble)

Silicon Dioxide (SiO2)

mineral
Hag Stone (Calcareous sedimentary rock (often Chert, Flint, or Limestone)) — sedimentary

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

sedimentary
Amethyst (Crystalline Silicon Dioxide with Iron impurities (SiO2)) — mineral

Amethyst

Crystalline Silicon Dioxide with Iron impurities (SiO2)

mineral
Dendritic Agate (specifically Orange/Tumbled) (Silicon Dioxide (SiO2) with Oxide Inclusions) — mineral

Dendritic Agate (specifically Orange/Tumbled)

Silicon Dioxide (SiO2) with Oxide Inclusions

mineral
Granite (Dioritic variant) (Granite (Phaneritic Igneous Rock)) — igneous

Granite (Dioritic variant)

Granite (Phaneritic Igneous Rock)

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

Petrified Wood

Silicified Wood (primarily SiO2)

sedimentary
Amethyst (Polished Cabochon) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Polished Cabochon)

Silicon Dioxide (SiO2) with iron impurities

mineral
River Siltstone Pebble (Siltstone (primarily composed of silica and clay minerals)) — sedimentary

River Siltstone Pebble

Siltstone (primarily composed of silica and clay minerals)

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

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic
Smoky Quartz (Smoky Quartz (SiO ₂)) — Mineral

Smoky Quartz

Smoky Quartz (SiO ₂)

Mineral
Agatized Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Agatized Chert / Chalcedony

Silicon Dioxide (SiO2)

sedimentary
Bumblebee Jasper (Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)) — mineral

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

mineral
Granite (Granite) — igneous

Granite

Granite

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Ironstone Nodule (Ironstone Concretion) (Siderite-rich Mudstone (FeCO3) or Limonite (FeO(OH)·nH2O)) — sedimentary

Ironstone Nodule (Ironstone Concretion)

Siderite-rich Mudstone (FeCO3) or Limonite (FeO(OH)·nH2O)

sedimentary
Greywacke with Quartz Veins (Lithic Sandstone (Greywacke) with SiO2 inclusions) — sedimentary

Greywacke with Quartz Veins

Lithic Sandstone (Greywacke) with SiO2 inclusions

sedimentary
Quartz (Milky or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

mineral
Banded Agate (Onyx variety) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Banded Agate (Onyx variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

mineral