Rock Identifier

Category

Igneous Or Sedimentary

Browse igneous or sedimentary specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary in the encyclopedia

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Kimberlite

Diorite

Coal

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

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss with Orthoclase Feldspar (Gneissic Metamorphic Rock with K-Feldspar inclusions) — metamorphic

Gneiss with Orthoclase Feldspar

Gneissic Metamorphic Rock with K-Feldspar inclusions

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

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Chalcedony (Agate Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate Pebble)

Microcrystalline Quartz (SiO2)

Agate Geode (Chalcedony (cryptocrystalline SiO2)) — mineral

Agate Geode

Chalcedony (cryptocrystalline SiO2)

Ruby Zoisite (Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)) — metamorphic

Ruby Zoisite

Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Granitoid Gneiss with Feldspar Vein (Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)) — metamorphic

Granitoid Gneiss with Feldspar Vein

Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)

Banded Gneiss (with Quartz Vein) (Gneiss (SiO2 and varied Silicates)) — metamorphic

Banded Gneiss (with Quartz Vein)

Gneiss (SiO2 and varied Silicates)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (with Granite/Pegmatite Vein) (Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)) — metamorphic

Gneiss (with Granite/Pegmatite Vein)

Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Banded gneiss pebble (Gneiss, chiefly quartz–feldspar–biotite (composition variable)) — metamorphic

Banded gneiss pebble

Gneiss, chiefly quartz–feldspar–biotite (composition variable)

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Granite Gneiss River Rock (Gneiss) — Metamorphic

Granite Gneiss River Rock

Gneiss

Gneiss (River Cobble) (Metamorphic Gneiss) — metamorphic

Gneiss (River Cobble)

Metamorphic Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Banded gneiss (Gneiss, commonly quartz–feldspar–biotite gneiss) — metamorphic

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

River Cobble (Salt and Pepper Gneiss) (Gneiss (High-grade regional metamorphic rock)) — metamorphic

River Cobble (Salt and Pepper Gneiss)

Gneiss (High-grade regional metamorphic rock)

Gneiss (Metamorphic Pebble) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (Metamorphic Pebble)

Gneissic Metamorphic Rock

Chalcedony (Carnelian Agate pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Carnelian Agate pebble)

Silicon Dioxide (SiO2)

Banded Gneiss (Gneiss (quartz-feldspar-biotite metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Green Fluorite (Beaded) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite (Beaded)

Fluorite (Calcium Fluoride, CaF2)

Turquoise (possible Dyed Magnesite/Howlite) (CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (possible Dyed Magnesite/Howlite)

CuAl6(PO4)4(OH)8·4H2O

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

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Agate (Chalcedony (SiO2) with impurities) — mineral

Banded Agate

Chalcedony (SiO2) with impurities

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartz Geode (Quartz (Silicon Dioxide, SiO2)) — Mineral

Quartz Geode

Quartz (Silicon Dioxide, SiO2)

Banded Agate (specifically Sardonyx or Carnelian Agate) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (specifically Sardonyx or Carnelian Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Banded Gneiss with Quartz Vein (Foliated Metamorphic Rock (Gneiss)) — metamorphic

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist) (Quartz–feldspar–mica rock; exact identification requires testing) — metamorphic

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)

Quartz–feldspar–mica rock; exact identification requires testing