Rock Identifier

Category

Sedimentary (Secondary Mineral) Within Igneous

Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.

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

Carnelian (Carnelian Agate)

Carnelian (Silicon Dioxide - SiO2)

mineral
Almandine Garnet (Almandine [Fe3Al2(SiO4)3]) — mineral

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

mineral
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

mineral
Sandstone (with Liesegang rings or Oxidation) (Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)) — sedimentary

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

sedimentary
Clear Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Silica (SiO2·nH2O)

mineral
Clear Quartz Fragment (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Rose variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

mineral
Milky Quartz / Rose Quartz fragment (Silicon Dioxide (SiO2)) — mineral

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

mineral
Chert (with Quartz Veining) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (with Quartz Veining)

Microcrystalline silicon dioxide (SiO2)

sedimentary
Granite (Granite (a felsic intrusive igneous rock)) — Igneous Rock

Granite

Granite (a felsic intrusive igneous rock)

Igneous Rock
Amethyst (Quartz (SiO2) with trace iron impurities) — Mineral

Amethyst

Quartz (SiO2) with trace iron impurities

Mineral
Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

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

Milky Quartz (Tumbled)

Quartz (Silicon Dioxide, SiO2)

mineral
Amethyst (Silicon dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon dioxide (SiO2) with iron impurities

mineral
Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

igneous
Fossil Crab (Decapoda (likely Avitelmessus or Raninidae family)) — sedimentary

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

sedimentary
Clear Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Granite (Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).) — igneous

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

igneous
Chalcedony (specifically Agate or Carnelian variety) (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony (specifically Agate or Carnelian variety)

Cryptocrystalline Silica (SiO2)

mineral
Sandstone (Ferruginous Concretion) (Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement) — sedimentary

Sandstone (Ferruginous Concretion)

Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement

sedimentary
Quartz Pebble (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

mineral
Basalt with Caliche Crust (Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating) — igneous

Basalt with Caliche Crust

Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating

igneous
Chert (variations include Flint/Chalcedony) (Chert (SiO2 - Silicon Dioxide)) — sedimentary

Chert (variations include Flint/Chalcedony)

Chert (SiO2 - Silicon Dioxide)

sedimentary
Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

sedimentary
Native Gold (Native Gold (Au)) — mineral

Native Gold

Native Gold (Au)

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

mineral
Magnetite (Lodestone) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone)

Magnetite (Fe3O4)

mineral
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

mineral
Chalcedony (Grey/White Agate) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Grey/White Agate)

Silicon Dioxide (SiO₂)

mineral
Blue Chalcedony (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

mineral
Red Garnet (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Red Garnet

Almandine Garnet (Fe3Al2(SiO4)3)

mineral
Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

mineral
Quartz (Milky/Crystalline) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Milky/Crystalline)

Quartz (Silicon Dioxide, SiO2)

mineral