Rock Identifier

Category

Sedimentary Rock Or Mineral (Depending On Origin And Purity)

Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.

Brown Jasper (Jasper (a cryptocrystalline variety of Quartz, SiO2)) — Mineral, specifically a variety of Quartz

Brown Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO2)

Mineral, specifically a variety of Quartz

Pink Feldspar (Orthoclase Feldspar (KAlSi3O8)) — mineral

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Quartz (Quartz (SiO2)) — Mineral

Quartz

Quartz (SiO2)

Greisen (Quartz-Muscovite-Turretine Rock) (Greisen) — Metamorphic Rock

Greisen (Quartz-Muscovite-Turretine Rock)

Greisen

Metamorphic Rock

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Flakes (Native Gold (Au)) — mineral

Gold Flakes

Native Gold (Au)

Fluorite Tower (Calcium Fluoride (CaF2)) — mineral

Fluorite Tower

Calcium Fluoride (CaF2)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads) (Chalcedony (SiO2), Jasper (SiO2 with impurities)) — Mineral (specifically a cryptocrystalline variety of Quartz)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Mineral (specifically a cryptocrystalline variety of Quartz)

Jade (Nephrite or Jadeite) (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)) — Metamorphic rock (for both Nephrite and Jadeite)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)

Metamorphic rock (for both Nephrite and Jadeite)

Fluorite (Purple variety) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Purple variety)

Calcium Fluoride (CaF2)

Quartz (Milky Quartz) (Silicon Dioxide (SiO₂)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

River/Stream Pebble (Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)) — Mineral, specifically a rock fragment

River/Stream Pebble

Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)

Mineral, specifically a rock fragment

Carved Mottled Greenish-Yellow Crystal/Glass Object (Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.) — Man-made Object/Uncertain Mineral

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Man-made Object/Uncertain Mineral

Chert (Jasper variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline quartz (SiO2)

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Marble (Recrystallized Calcite Rock (CaCO3)) — metamorphic

Marble

Recrystallized Calcite Rock (CaCO3)

Biotite Mica (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Hag Stone (Perforated Chert (Microcrystalline Silica, SiO2)) — sedimentary

Hag Stone

Perforated Chert (Microcrystalline Silica, SiO2)

Boxwork Quartz / Septarian Jasper (Boxwork (SiO2 with iron oxide inclusions)) — metamorphic

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Serpentine (Nephrite-like River Cobble) (Serpentinite (Hydrous Magnesium Iron Silicate)) — metamorphic

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Clay (as a rock-forming material) (Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)) — Mineral

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Muscovite Mica (Muscovite / KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Schist (Mica Schist (contains muscovite/biotite and quartz)) — metamorphic

Schist

Mica Schist (contains muscovite/biotite and quartz)

Banded River Rock / Gneiss (highly weathered) (Gneiss) — Metamorphic rock

Banded River Rock / Gneiss (highly weathered)

Gneiss

Metamorphic rock

Red Coral (Corallium rubrum) — mineral

Red Coral

Corallium rubrum

Jade (Nephrite or Jadeite) (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)) — Metamorphic Rock / Mineral

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Metamorphic Rock / Mineral

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Silver (Sterling Silver Jewelry) (Argentum (Ag) mixed with Copper (Cu)) — mineral

Silver (Sterling Silver Jewelry)

Argentum (Ag) mixed with Copper (Cu)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Ferruginous Sandstone Pebble (Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)) — sedimentary

Ferruginous Sandstone Pebble

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH) staining)

Shale or Slaty Mudstone (Argillaceous sedimentary rock) — sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Gold-bearing Quartz with Iron Oxides (Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)) — mineral

Gold-bearing Quartz with Iron Oxides

Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)

Quartz Geode with Calcite (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — Mineral/Geode

Quartz Geode with Calcite

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)