Sedimentary Mineral

Browse sedimentary mineral specimens identified by the Rock Identifier community.

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

metamorphic

Celestine (Celestite)

Strontium sulfate (SrSO4)

mineral

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

sedimentary

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite (formerly believed to be Jasper)

igneous

Marble

Metamorphosed Limestone (main mineral: Calcite, CaCO3)

metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

metamorphic

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

igneous

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral impurities

sedimentary

Shale

Shale (composition varies: primarily clay minerals and quartz)

sedimentary

Celestine (or Celestite)

Strontium sulfate (SrSO4)

mineral

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2 with iron impurities)

sedimentary

Chert (Jasper variety)

Chert (SiO2)

sedimentary

Schist/Phyllite

Metamorphic Schist (Chlorite Schist variety)

metamorphic

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

metamorphic

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

metamorphic

Gneiss

metamorphic

Gneiss (Metamorphic Rock)

Gneiss

metamorphic

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

metamorphic

Crinoid Stem Columns (Fossil)

Crinoidea (Class); often composed of the mineral Calcite (CaCO3)

sedimentary

Jasper Conglomerate

Jasper Conglomerate (SiO2 matrix with varying mineral inclusions)

sedimentary

Quartz (pebble)

Quartz (SiO₂)

Mineral

Sandstone

Arenite (SiO2 based)

sedimentary

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Sedimentary rock (specifically a concretion or possibly a geode)