Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

Browse igneous or sedimentary (water worn) specimens identified by the Rock Identifier community.

Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

mineral
Pumice (Pumicite) — igneous

Pumice

Pumicite

igneous
Jasper (Jasper (Silica, SiO2)) — sedimentary

Jasper

Jasper (Silica, SiO2)

sedimentary
White Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

White Precious Opal

Hydrated Silica (SiO2·nH2O)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Chert Pebble / Brachiopod Fossil Internal Mold (Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)) — sedimentary

Chert Pebble / Brachiopod Fossil Internal Mold

Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)

sedimentary
Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

mineral
Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral
Jasper in Basalt Matrix (Silicon Dioxide (SiO2) with impurities; Chalcedony) — sedimentary (secondary mineral) within igneous

Jasper in Basalt Matrix

Silicon Dioxide (SiO2) with impurities; Chalcedony

sedimentary (secondary mineral) within igneous
Pumice (Pumice (volcanic rock)) — Igneous

Pumice

Pumice (volcanic rock)

Igneous
Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Satin Spar (Gypsum) (Hydrous Calcium Sulfate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

mineral
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Puddingstone (Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)) — Sedimentary

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Sedimentary
Sandstone (Sandstone (Sedimentary rock composed of silicate grains)) — sedimentary

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

sedimentary
Jasper (Silicon dioxide (SiO2) with iron oxide and clay inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide and clay inclusions

sedimentary
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Diorite (Dalmatian Stone) (Phaneritic Plutonic Diorite) — igneous

Diorite (Dalmatian Stone)

Phaneritic Plutonic Diorite

igneous
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Gold Placer (Gold Flakes and Nuggets) (Native Gold (Au)) — mineral

Gold Placer (Gold Flakes and Nuggets)

Native Gold (Au)

mineral
Aquamarine (Beryllium aluminum silicate (Be3Al2Si6O18)) — mineral

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

mineral
Pegmatite with Schorl (Black Tourmaline) and Mica (Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)) — igneous

Pegmatite with Schorl (Black Tourmaline) and Mica

Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)

igneous
Amazonite (Amazonite (KAlSi3O8)) — mineral

Amazonite

Amazonite (KAlSi3O8)

mineral
Granite Pegmatite with Tourmaline and Muscovite (Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))) — igneous

Granite Pegmatite with Tourmaline and Muscovite

Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))

igneous
Milky Quartz (Quartz (SiO2)) — mineral

Milky Quartz

Quartz (SiO2)

mineral
Felsic Igneous Rock (likely Rhyolite or weathered Granite) (Felsic Volcanic/Plutonic Rock) — igneous

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

igneous
Scoria (Lava Rock) (Vesicular Basalt / Scoria) — Igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Igneous
Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

sedimentary
Sandstone (Arenite (Siliclastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Siliclastic Sedimentary Rock)

sedimentary
Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

sedimentary
Quartz Geode (Silicon Dioxide (SiO2) within a geode) — mineral

Quartz Geode

Silicon Dioxide (SiO2) within a geode

mineral
Gray Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Gray Quartz (Tumbled)

Silicon Dioxide (SiO2)

mineral
Pink Opal / Peruvian Opal (Hydrated amorphous silicon dioxide (SiO2·nH2O)) — Mineral

Pink Opal / Peruvian Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Mineral
Satin Spar (Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

mineral
Sandstone (Quartzite Pebble) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (SiO2)

sedimentary
Halite (Halite (Sodium Chloride, NaCl)) — mineral

Halite

Halite (Sodium Chloride, NaCl)

mineral
Pyrite (Pyrite (FeS2)) — Mineral

Pyrite

Pyrite (FeS2)

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

Biotite or Phlogopite Mica

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

mineral
Shale (Fissile mudrock (composed of clay-sized particles and detrital grains)) — sedimentary

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

sedimentary