Rock Identifier

Category

Sedimentary (Volcanic)

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

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous
Diamond in Kimberlite (Kimberlite Matrix with Carbon (Diamond)) — igneous

Diamond in Kimberlite

Kimberlite Matrix with Carbon (Diamond)

igneous
Copper Ore (with Azurite and Malachite) (Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)) — mineral

Copper Ore (with Azurite and Malachite)

Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)

mineral
Nuummite (Orthoamphibole (Anthophyllite-Gedrite composition)) — metamorphic

Nuummite

Orthoamphibole (Anthophyllite-Gedrite composition)

metamorphic
Peridot (Olivine (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Mg, Fe)2SiO4

mineral
Diabase (Diabase (also known as Dolerite)) — igneous

Diabase

Diabase (also known as Dolerite)

igneous
Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

mineral
Diorite (Diorite (an intrusive igneous rock)) — igneous

Diorite

Diorite (an intrusive igneous rock)

igneous
Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous
Cinnabar (Mercury(II) sulfide (HgS)) — mineral

Cinnabar

Mercury(II) sulfide (HgS)

mineral
Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous
Green Moss Agate (Agate (Silicon Dioxide, SiO2) with inclusions of hornblende or chlorite) — mineral

Green Moss Agate

Agate (Silicon Dioxide, SiO2) with inclusions of hornblende or chlorite

mineral
Larimar (Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Pectolite (NaCa2Si3O8(OH))

mineral
Granite (Granite (Phaneritic Quartz-Feldspar Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Rock)

igneous
Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

mineral
Larimar (Blue Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

mineral
Amethyst (Polished Cabochon) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Polished Cabochon)

Silicon Dioxide (SiO2) with iron impurities

mineral
Diamond (C (Carbon)) — mineral

Diamond

C (Carbon)

mineral
Banded Agate (specifically Black Sardonyx/Onyx variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (specifically Black Sardonyx/Onyx variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

mineral
Amethyst (Amethyst (Silicon Dioxide, SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

mineral
Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral
Basalt (Basalt (composition: Plagioclase, Pyroxene, and Olivine)) — igneous

Basalt

Basalt (composition: Plagioclase, Pyroxene, and Olivine)

igneous
Peridot (Olivine (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Mg, Fe)2SiO4

mineral
Lava Rock (Scoria) (Extrusive basaltic scoria) — igneous

Lava Rock (Scoria)

Extrusive basaltic scoria

igneous
Fish Fossil in Limestone (Lycoptera (likely) in Micritic Limestone) — sedimentary

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

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

Sandstone (Quartzite Pebble)

Arenite (SiO2)

sedimentary
Chert (Jasper/Flint variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

sedimentary
Limonite stained Sandstone (Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)) — sedimentary

Limonite stained Sandstone

Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)

sedimentary
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Sandstone (likely Calcareous or Micaceous) (Clastic sedimentary rock (primarily Quartz with Cementing Agents)) — sedimentary

Sandstone (likely Calcareous or Micaceous)

Clastic sedimentary rock (primarily Quartz with Cementing Agents)

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

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

sedimentary
Shale (Laminated Mudstone) — sedimentary

Shale

Laminated Mudstone

sedimentary
Sulfur (in host rock) (Native Sulfur (S8)) — mineral

Sulfur (in host rock)

Native Sulfur (S8)

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

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

mineral
Carnelian Agate Nodule (Silicon Dioxide (SiO2) - Carnelian Chalcedony) — mineral

Carnelian Agate Nodule

Silicon Dioxide (SiO2) - Carnelian Chalcedony

mineral
Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

mineral
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Peridot (Gem-quality Olivine) (Magnesium Iron Silicate ((Mg, Fe)2SiO4)) — mineral

Peridot (Gem-quality Olivine)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

mineral
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Basalt with Quartz Vein and Weathering Crust (Amygdaloidal or Porphyritic Basalt) — igneous

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

igneous
Porphyry (Porphyritic Rock) — igneous

Porphyry

Porphyritic Rock

igneous
Basalt (Basalt) — igneous

Basalt

Basalt

igneous