Rock Identifier

Category

Sedimentary Or Igneous (Secondary Formation)

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

Learn about Sedimentary Or Igneous (Secondary Formation) in the encyclopedia

Banded Iron Formation

Banded Iron Formation

Itabirite

Jaspillite

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Epidote (with Quartz and Feldspar) (Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

Banded Iron Formation (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation

Banded Iron Formation (BIF)

Basalt Pebble with Quartz Veining (Basalt (extrusive volcanic rock)) — igneous

Basalt Pebble with Quartz Veining

Basalt (extrusive volcanic rock)

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Quartz-rich pegmatite (likely feldspar–quartz rock) (Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining) — igneous

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining

Rounded quartz-rich river pebble (Quartz (SiO₂), likely derived from quartzite or granitic rock) — igneous

Rounded quartz-rich river pebble

Quartz (SiO₂), likely derived from quartzite or granitic rock

Granite Cobble (Phaneritic plutonic rock (dominated by Quartz, Feldspar, and Mica)) — igneous

Granite Cobble

Phaneritic plutonic rock (dominated by Quartz, Feldspar, and Mica)

Basalt with Quartz Veins (Amygdaloidal Basalt (matrix) with Crystalline SiO2 (veins)) — igneous

Basalt with Quartz Veins

Amygdaloidal Basalt (matrix) with Crystalline SiO2 (veins)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Dyed Quartz Geode (Dyed crystalline quartz (Silicon Dioxide, SiO2)) — mineral

Dyed Quartz Geode

Dyed crystalline quartz (Silicon Dioxide, SiO2)

Magnetite (Magnetite (Fe3O4)) — Mineral

Magnetite

Magnetite (Fe3O4)

Jasper pebble (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary (secondary classification: cryptocrystalline quartz)

Jasper pebble

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary (secondary classification: cryptocrystalline quartz)

Painted Garden Rock (Coated Siltstone or Mudstone) — sedimentary

Painted Garden Rock

Coated Siltstone or Mudstone

Basalt with Amygdules (Amygdaloidal Basalt) — igneous

Basalt with Amygdules

Amygdaloidal Basalt

Ruby (Raw Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Agate (Fortification Agate) (Banded Chalcedony (SiO2)) — mineral

Agate (Fortification Agate)

Banded Chalcedony (SiO2)

Citrine or Yellow Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine or Yellow Quartz

Silicon Dioxide (SiO2) with iron impurities

Native Gold (in Jewelry) (Gold (Au)) — mineral

Native Gold (in Jewelry)

Gold (Au)

Eudialyte (Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2) — mineral

Eudialyte

Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Aquamarine (Beryl (Be3Al2Si6O18 with Fe2+ impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ impurities)

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)) — mineral

Limonite (Iron Ore)

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

Turquoise (Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Specular Hematite with Quartz and Limonite (Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)) — Mineral

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Limonite/Goethite (Iron Ore) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite/Goethite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)

Iron Ore (Limonite and Hematite) (Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)) — mineral

Iron Ore (Limonite and Hematite)

Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Botryoidal Quartz (Silicon Dioxide (SiO2)) — mineral

Botryoidal Quartz

Silicon Dioxide (SiO2)

Red Garnet (Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)) — Mineral

Red Garnet

Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Banded Chert or Chert with Quartz Veins (Chert (SiO2)) — Sedimentary

Banded Chert or Chert with Quartz Veins

Chert (SiO2)

Veined Basalt River Stone (Basalt with Calcite or Quartz veining) — igneous

Veined Basalt River Stone

Basalt with Calcite or Quartz veining

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Greenstone (Metabasalt / Chlorite Schist) — metamorphic

Greenstone

Metabasalt / Chlorite Schist