Rock Identifier

Category

Sedimentary Rock (Metamorphosed)

Browse sedimentary rock (metamorphosed) specimens identified by the Rock Identifier community.

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Chert (specifically Flint or Common Chert node) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Quartz (Silicon dioxide (SiO2)) — Mineral

Quartz

Silicon dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Dark Igneous Rock (Likely Basalt or Diabase) (Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.) — Igneous

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Banded Flint (Polished Stripe Flint) (Silicon Dioxide (SiO2) - variety of Chert) — sedimentary

Banded Flint (Polished Stripe Flint)

Silicon Dioxide (SiO2) - variety of Chert

Kambaba Jasper (Stromatolite (Fossilized Algae)) — sedimentary

Kambaba Jasper

Stromatolite (Fossilized Algae)

Chert (Chalk-associated Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chalk-associated Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert / River Jasper

Microcrystalline Quartz (SiO2)

Jasper and Yellow Chert (Tumbled) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Yellow Chert (Tumbled)

Microcrystalline Quartz (SiO2)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Chert (specifically Flint or Jasper variant) (Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)

Chert (Jasper/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chalcedony on Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Dendritic Agate (River Pebble) (Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions) — mineral

Dendritic Agate (River Pebble)

Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions

Quartz Geode (Silicon Dioxide (SiO2)) — Mineral/Sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Mineral/Sedimentary

Quartz / Common Opal Transition (Silicon Dioxide (SiO2)) — mineral

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

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

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Quartzite / Sandstone / Chert Mix (Silicon Dioxide (SiO2)) — sedimentary and metamorphic

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

sedimentary and metamorphic

Sandstone Concretion (Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)

Geode (Unopened) (Silica-rich Concretion (primarily SiO2)) — sedimentary

Geode (Unopened)

Silica-rich Concretion (primarily SiO2)

Jasper (specifically Bloodstone or Heliotrope variety) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary (chemically precipitated)

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary (chemically precipitated)

Veined Pebble (likely a Quartz-Veined Pebble) (Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)) — Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)

Veined Pebble (likely a Quartz-Veined Pebble)

Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)

Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)

Banded Agate (Sedimentary Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Sandstone Concretion (Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)) — sedimentary

Sandstone Concretion

Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)

Green Aventurine (Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

River Pebble Gravel (Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)) — sedimentary

River Pebble Gravel

Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)

Sandstone (Quartzose Sandstone) (Arenite) — sedimentary

Sandstone (Quartzose Sandstone)

Arenite

Sandstone (Arenite (SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (SiO2 with various cementing agents)

River Pebble (Quartz-rich) (Silicon Dioxide (SiO2) with various inclusions) — sedimentary

River Pebble (Quartz-rich)

Silicon Dioxide (SiO2) with various inclusions

Sandstone (Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)) — Sedimentary Rock

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Sedimentary Rock

Yellow Jasper (Silicon Dioxide with Iron inclusions (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide with Iron inclusions (SiO2)

African Turquoise (Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)) — sedimentary

African Turquoise

Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)