Rock Identifier

Category

Sedimentary Or Igneous (Host Environment)

Browse sedimentary or igneous (host environment) specimens identified by the Rock Identifier community.

Rutilated Quartz (SiO2 with TiO2 inclusions (Rutile)) — Mineral

Rutilated Quartz

SiO2 with TiO2 inclusions (Rutile)

Quartz Druze (on Matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Chalcedony in Host Rock (Silicon Dioxide (SiO2)) — mineral

Chalcedony in Host Rock

Silicon Dioxide (SiO2)

Schist with Schorl (Black Tourmaline) (NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)) — metamorphic

Schist with Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Milky Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

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

Chert / Jasper

Microcrystalline Quartz (SiO2)

Botryoidal Chalcedony (Desert Rose / Agate) (Silicon Dioxide (SiO₂)) — Mineral variant

Botryoidal Chalcedony (Desert Rose / Agate)

Silicon Dioxide (SiO₂)

Mineral variant

Druzy Chalcedony (Agate Geode) (Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz) — mineral

Druzy Chalcedony (Agate Geode)

Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz

Wishing Rock (Quartz Vein in Host Rock) (Silicon dioxide (SiO2) vein in various host rocks) — Igneous/Sedimentary/Metamorphic with Mineral Vein

Wishing Rock (Quartz Vein in Host Rock)

Silicon dioxide (SiO2) vein in various host rocks

Igneous/Sedimentary/Metamorphic with Mineral Vein

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Spinifex Textured Komatiite (Komatiite (Mg-rich ultramafic volcanic rock)) — igneous

Spinifex Textured Komatiite

Komatiite (Mg-rich ultramafic volcanic rock)

Quartzite Geode or Crystalline Quartz Node (Silicon Dioxide (SiO2)) — metamorphic

Quartzite Geode or Crystalline Quartz Node

Silicon Dioxide (SiO2)

Chert / Flint (Silicon dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon dioxide (SiO2)

Vuggy Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Vuggy Quartz on Matrix

Silicon Dioxide (SiO2)

Emerald in Matrix (Quartz/Schist) (Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Granite Gneiss or Granitoid River Rock (Granitoid / Gneiss) — Metamorphic or Igneous

Granite Gneiss or Granitoid River Rock

Granitoid / Gneiss

Metamorphic or Igneous

Larimar (Pectolite [NaCa2Si3O8(OH)] with copper substitution) — mineral

Larimar

Pectolite [NaCa2Si3O8(OH)] with copper substitution

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Magnetite (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite

Iron(II,III) oxide (Fe3O4)

Granitic Pegmatite (Granitic Pegmatite with Quartz and Feldspar) — igneous

Granitic Pegmatite

Granitic Pegmatite with Quartz and Feldspar

Sandstone Concretion (Ferruginous Sandstone Concretion (SiO2 + FeO(OH))) — sedimentary

Sandstone Concretion

Ferruginous Sandstone Concretion (SiO2 + FeO(OH))

Quartz in Host Rock (Silicon Dioxide (SiO2) in Rhyolite or Granite matrix) — igneous

Quartz in Host Rock

Silicon Dioxide (SiO2) in Rhyolite or Granite matrix

Painted River Pebble (likely Basalt or Greywacke) (Aphanitic Lithic Clast with Anthropogenic Pigment coating) — Sedimentary or Igneous

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Sedimentary or Igneous

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Rough Star Sapphire (Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Amethyst (Quartz variety) (Amethyst [Silicon Dioxide (SiO2)]) — mineral

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

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

White Agate (Chalcedony)

Silicon Dioxide (SiO2)

Banded Chalcedony (Agate) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Chalcedony (Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sandstone (Ferruginous) (Arenite (Fe2O3 rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 rich)

Quartz-Veined Mudstone (Argillaceous Mudstone with Quartz Veining) — sedimentary

Quartz-Veined Mudstone

Argillaceous Mudstone with Quartz Veining

Blue Sapphire (Corundum (Al2O3 - Aluminum Oxide)) — mineral

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Basalt with Quartz Vein (Basalt (Mafic volcanic rock) with secondary Quartz (SiO2) intrusion) — igneous

Basalt with Quartz Vein

Basalt (Mafic volcanic rock) with secondary Quartz (SiO2) intrusion

Olivine in Basalt (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)) — igneous

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)

Limestone (specifically Dolomitic/Crystalline Limestone) (Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)) — sedimentary

Limestone (specifically Dolomitic/Crystalline Limestone)

Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)

Chert (Jasper/Agate variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)