Rock Identifier

Category

Sedimentary Or Igneous (Secondary Formation)

Browse sedimentary or igneous (secondary formation) specimens identified by the Rock Identifier community.

Jasper (likely Polychrome or Ocean Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (likely Polychrome or Ocean Jasper)

Silicon Dioxide (SiO2) with impurities

Scoria (Red Lava Rock) (Scoria) — igneous

Scoria (Red Lava Rock)

Scoria

Limonite (Yellow Ochre) (Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Banded Iron Formation (BIF) / Tiger Iron variety (Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)) — sedimentary

Banded Iron Formation (BIF) / Tiger Iron variety

Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)

Basalt (Basalt (containing mainly Plagioclase feldspar and Pyroxene)) — igneous

Basalt

Basalt (containing mainly Plagioclase feldspar and Pyroxene)

Basalt (Mafic Volcanic Rock) — igneous

Basalt

Mafic Volcanic Rock

Chert (Brecciated River Cobble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brecciated River Cobble)

Silicon Dioxide (SiO2)

Dalmatian Stone (Peralkaline rhyolite) — igneous

Dalmatian Stone

Peralkaline rhyolite

Graphite-veined Quartzite (Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)) — metamorphic

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

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

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Chert (Nodule) (Crystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Crystalline Silicon Dioxide (SiO2)

Chert (Chert (microcrystalline quartz)) — Sedimentary

Chert

Chert (microcrystalline quartz)

Red Sandstone (Arenite (Fe2O3 rich)) — sedimentary

Red Sandstone

Arenite (Fe2O3 rich)

Red Jasper (Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)) — Mineral

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Yellow Aventurine (Silicon Dioxide (SiO2) with inclusions) — mineral

Yellow Aventurine

Silicon Dioxide (SiO2) with inclusions

Pyrite (Pyrite (Iron sulfide, FeS₂)) — mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

Sandstone (Yellow/Tan Sandstone) (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone (Yellow/Tan Sandstone)

Arenite (primarily Quartz, SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Black Tourmaline (Schorl) (Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))) — mineral

Black Tourmaline (Schorl)

Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))

Greenstone (Metabasalt / Chlorite-Epidote Schist) — metamorphic

Greenstone

Metabasalt / Chlorite-Epidote Schist

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Yellow Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary (or mineraloid)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary (or mineraloid)

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

Red Jasper (possibly banded)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert Nodule (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (Flint)

Microcrystalline Quartz (SiO2)

Red Jasper (Jasper (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Jasper (SiO2) with Hematite (Fe2O3) inclusions

Quartz Crystal Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Garnet (specifically Almandine) (Almandine - Fe3Al2(SiO4)3) — metamorphic

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

Zoisite with Ruby (Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)) — metamorphic

Zoisite with Ruby

Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)

Selenite (Satin Spar) (Gypsum (CaSO4·2H2O)) — mineral

Selenite (Satin Spar)

Gypsum (CaSO4·2H2O)

Puddingstone (Jasper Conglomerate) (Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)) — Sedimentary

Puddingstone (Jasper Conglomerate)

Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)

Sandstone (Arenite (primarily SiO2 with trace Fe2O3)) — sedimentary

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

Red Jasper (Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)

Red Jasper with Quartz and Hematite (Silicon Dioxide (SiO2) with Ferric Iron inclusions) — sedimentary

Red Jasper with Quartz and Hematite

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Jasper (Green variety) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Green variety)

Silicon Dioxide (SiO₂)

Banded Iron Formation (Jasper-Hematite) (Banded Iron Formation (BIF); composition primarily Hematite (Fe2O3) and Chalcedony/Quartz (SiO2)) — sedimentary

Banded Iron Formation (Jasper-Hematite)

Banded Iron Formation (BIF); composition primarily Hematite (Fe2O3) and Chalcedony/Quartz (SiO2)

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

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Quartz Druse (on Chalcedony/Agate base) (Silicon Dioxide (SiO2)) — mineral

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Dalmatian Stone (often called Dalmatian Jasper) (Peralkaline Feldsphathic Igneous Rock) — igneous

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Feldsphathic Igneous Rock

Yellow Diamond (Faceted) (Diamond (C - Pure Carbon)) — mineral

Yellow Diamond (Faceted)

Diamond (C - Pure Carbon)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock