Rock Identifier

Category

Sedimentary Or Igneous (Host Environment)

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

Learn about Sedimentary Or Igneous (Host Environment) in the encyclopedia

Carbonatite

Emerald in Matrix

Emerald in Matrix

Conglomerate

Aquamarine Matrix

Aquamarine Matrix

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Hot Pink Tourmaline

Hot Pink Tourmaline

Lamproite

Pegmatite

Matrix Opal

Troctolite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone with Fossil Inclusions (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone with Fossil Inclusions

Sedimentary Carbonate Rock (CaCO3)

White tumbled stone, likely quartz or calcite (Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)) — mineral

White tumbled stone, likely quartz or calcite

Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)

Iron-rich concretion or weathered ironstone (Goethite–hematite-bearing ferruginous concretion; exact identification requires testing) — sedimentary

Iron-rich concretion or weathered ironstone

Goethite–hematite-bearing ferruginous concretion; exact identification requires testing

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2) and Slate/Shale) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Pegmatite (Igneous Pegmatite) — igneous

Pegmatite

Igneous Pegmatite

Carnelian (Carnelian (Silica/Chalcedony, SiO2)) — mineral

Carnelian

Carnelian (Silica/Chalcedony, SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Tumbled honey calcite (Calcite (CaCO₃), likely iron-stained variety) — mineral

Tumbled honey calcite

Calcite (CaCO₃), likely iron-stained variety

Orange calcite (honey calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Orange calcite (honey calcite)

Calcite, calcium carbonate (CaCO₃)

Quartz with Sulfide Inclusions (Silicon Dioxide (SiO2) with metallic mineral inclusions) — mineral

Quartz with Sulfide Inclusions

Silicon Dioxide (SiO2) with metallic mineral inclusions

Druzy Quartz on Limestone (Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)) — sedimentary

Druzy Quartz on Limestone

Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)

Goethite pseudomorph after Pyrite (Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)) — mineral

Goethite pseudomorph after Pyrite

Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)

Druzy Quartz on Sandstone (Silicon Dioxide (SiO2) with Quartz crystals) — sedimentary

Druzy Quartz on Sandstone

Silicon Dioxide (SiO2) with Quartz crystals

Chert (with Lichen) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Lichen)

Microcrystalline Quartz (SiO2)

Chert Nodules in Limestone (Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)) — sedimentary

Chert Nodules in Limestone

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

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

Quartz Vein in Basalt (Silicon Dioxide (SiO2) in Mafic Igneous Rock) — igneous

Quartz Vein in Basalt

Silicon Dioxide (SiO2) in Mafic Igneous Rock

Wishing Stone (Quartz-veined Porphyritic Basalt) (Igneous rock with quartz vein (SiO2)) — igneous

Wishing Stone (Quartz-veined Porphyritic Basalt)

Igneous rock with quartz vein (SiO2)

Blue Lace Agate (Silicon Dioxide (SiO₂), a variety of Chalcedony) — mineral

Blue Lace Agate

Silicon Dioxide (SiO₂), a variety of Chalcedony

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

Quartz with Feldspar and Mica (Pegmatite Fragment)

Granitic Pegmatite

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Greenstone (Greenschist (composed of chlorite, actinolite, and epidote)) — metamorphic

Greenstone

Greenschist (composed of chlorite, actinolite, and epidote)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Granite or Pegmatite in host rock (Granitoid / Felsic Intrusive Rock) — Igneous

Granite or Pegmatite in host rock

Granitoid / Felsic Intrusive Rock

Quartz Vein in Host Rock (Silicon dioxide (SiO2) veins in metamorphic/igneous host rock) — igneous

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veins in metamorphic/igneous host rock

Limestone (Limestone (CaCO3)) — sedimentary

Limestone

Limestone (CaCO3)

Ruby (Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr) — mineral

Ruby

Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr

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

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Quartz River Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz River Pebble

Silicon Dioxide (SiO2)

Quartz-Veined Sandstone (Quartz-veined Arenite) — sedimentary

Quartz-Veined Sandstone

Quartz-veined Arenite

Granite River Rock (Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite River Rock

Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Polished orbicular jasper (Orbicular jasper; microcrystalline quartz (SiO₂) with hematite/goethite and other silicate inclusions) — sedimentary

Polished orbicular jasper

Orbicular jasper; microcrystalline quartz (SiO₂) with hematite/goethite and other silicate inclusions

Pyrite with Vesicular Matrix (Iron Disulfide (FeS2)) — mineral

Pyrite with Vesicular Matrix

Iron Disulfide (FeS2)

Banded Agate (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Banded Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dendrite (Manganese Oxide Dendrites) (Psilomelane or Pyrolusite on Matrix (typically MnO2)) — mineral

Dendrite (Manganese Oxide Dendrites)

Psilomelane or Pyrolusite on Matrix (typically MnO2)

Banded Siltstone (Banded Siltstone / Laminated Siltstone) — sedimentary

Banded Siltstone

Banded Siltstone / Laminated Siltstone

Quartz Crystal Cluster with Iron Stain (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster with Iron Stain

Silicon Dioxide (SiO2)

Agate / Chalcedony (Silicon dioxide (SiO2)) — mineral

Agate / Chalcedony

Silicon dioxide (SiO2)

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

Turquoise

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