Rock Identifier

Category

Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.

Shale (Fissile Mudrock (Clay-rich Sedimentary Rock)) — sedimentary

Shale

Fissile Mudrock (Clay-rich Sedimentary Rock)

Green Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Green Jasper

Jasper (Silicon Dioxide, SiO2)

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Chert (Nodule) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Black Onyx (Onyx (Silicon Dioxide, SiO2)) — mineral

Black Onyx

Onyx (Silicon Dioxide, SiO2)

Quartzite (Quartzite (Mainly SiO2)) — metamorphic

Quartzite

Quartzite (Mainly SiO2)

Sandstone (Greywacke) (Clastic Sedimentary Rock (SiO2 with lithic fragments)) — sedimentary

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Quartzite (Quartzite (predominantly SiO2)) — metamorphic

Quartzite

Quartzite (predominantly SiO2)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Quartzite with Hematite staining (Quartzite (SiO2)) — metamorphic

Quartzite with Hematite staining

Quartzite (SiO2)

Hematite Beads (Hematite (Fe2O3)) — Mineral

Hematite Beads

Hematite (Fe2O3)

Granite (Granite (a felsic intrusive igneous rock)) — Igneous Rock

Granite

Granite (a felsic intrusive igneous rock)

Geode (Unopened) (Silica-lined Vug (primarily SiO2)) — sedimentary

Geode (Unopened)

Silica-lined Vug (primarily SiO2)

Yellow Aventurine (Quartzite with inclusions (SiO2)) — metamorphic

Yellow Aventurine

Quartzite with inclusions (SiO2)

Greenstone (Chlorite schist / Meta-basalt) — metamorphic

Greenstone

Chlorite schist / Meta-basalt

Breccia (Breccia - Clastic sedimentary rock) — sedimentary

Breccia

Breccia - Clastic sedimentary rock

Quartz Geode (with Agate banding) (Silicon Dioxide (SiO2)) — Sedimentary or Igneous (secondary formation)

Quartz Geode (with Agate banding)

Silicon Dioxide (SiO2)

Sedimentary or Igneous (secondary formation)

Arid Sandy Loam (Arenosols / Regosols) — sedimentary

Arid Sandy Loam

Arenosols / Regosols

Red Jasper (Chalcedony (SiO2 with Iron inclusions)) — sedimentary

Red Jasper

Chalcedony (SiO2 with Iron inclusions)

Granite (Granite) — igneous

Granite

Granite

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz on Basalt (Silicon Dioxide (SiO2) on Mafic Igneous Rock) — Mineral on Igneous Rock

Quartz on Basalt

Silicon Dioxide (SiO2) on Mafic Igneous Rock

Mineral on Igneous Rock

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz (SiO2)

Petrified Wood (Silicified wood (principally Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (principally Silicon Dioxide, SiO2)

Jasper (Silicon Dioxide (SiO2) with iron and magnesium inclusions) — sedimentary

Jasper

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Sandstone (Ferruginous) (Arenite (Fe2O3 dominant staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 dominant staining)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Turquoise (likely stabilized or Howlite/Magnesite imitation) (Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (likely stabilized or Howlite/Magnesite imitation)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Common Opal in Host Rock (Hydrated Silica (SiO2·nH2O)) — mineraloid

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Quartz (likely tumbled or naturally water-worn) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Ironstone Concretion (Limonite/Goethite) (Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)

Quartzite with Iron Staining (Silicon Dioxide (SiO2) with Fe2O3 impurities) — metamorphic

Quartzite with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 impurities

Banded Iron Formation (BIF) with Quartz (Banded Iron Formation, often composed of alternating layers of hematite (Fe2O3) or magnetite (Fe3O4) and chert (microcrystalline quartz, SiO2)) — Sedimentary

Banded Iron Formation (BIF) with Quartz

Banded Iron Formation, often composed of alternating layers of hematite (Fe2O3) or magnetite (Fe3O4) and chert (microcrystalline quartz, SiO2)

Chert (often called Flint or River Pebble) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (often called Flint or River Pebble)

Chert (Microcrystalline Quartz, SiO2)

Greywacke (Lithic wacke (variety of Sandstone)) — sedimentary

Greywacke

Lithic wacke (variety of Sandstone)

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Opal

Hydrated amorphous silica (SiO2·nH2O)

Desert Rose (Gypsum Variety) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)