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

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Rutilated Quartz (Rutile in Quartz (SiO2 with TiO2 inclusions)) — mineral

Rutilated Quartz

Rutile in Quartz (SiO2 with TiO2 inclusions)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix) — metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Weathered quartz-bearing rock fragment (Indeterminate; likely quartz-rich granite or silicified host rock with iron-oxide staining) — mineral

Weathered quartz-bearing rock fragment

Indeterminate; likely quartz-rich granite or silicified host rock with iron-oxide staining

Fossiliferous conglomerate (Bioclastic, carbonate-cemented conglomerate (likely limestone matrix)) — sedimentary

Fossiliferous conglomerate

Bioclastic, carbonate-cemented conglomerate (likely limestone matrix)

Turquoise (Turquoise (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Chert (River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (River Pebble)

Silicon Dioxide (SiO2)

Raw quartz crystal (Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz) — mineral

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz

Quartz (or Chalcedony) Specimen (Silicon Dioxide (SiO2)) — mineral

Quartz (or Chalcedony) Specimen

Silicon Dioxide (SiO2)

Mica-rich schist (probable) (Foliated quartz–mica schist; likely containing quartz, muscovite and/or biotite) — metamorphic

Mica-rich schist (probable)

Foliated quartz–mica schist; likely containing quartz, muscovite and/or biotite

Garnet Gneiss (Gneiss containing Almandine Garnet) — metamorphic

Garnet Gneiss

Gneiss containing Almandine Garnet

Fossil-bearing sedimentary rock (possible bone or shell fossil) (Unidentified fossiliferous sedimentary matrix; exact fossil and host rock cannot be determined from the image) — fossil

Fossil-bearing sedimentary rock (possible bone or shell fossil)

Unidentified fossiliferous sedimentary matrix; exact fossil and host rock cannot be determined from the image

Quartz (Pink/Rose Quartz or Quartz Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Pink/Rose Quartz or Quartz Crystal)

Silicon Dioxide (SiO2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Agate (or Operculum / Fossil Shell) (Silicon Dioxide (SiO2)) — mineral

Agate (or Operculum / Fossil Shell)

Silicon Dioxide (SiO2)

Small quartz-rich stone, possibly iron-stained quartz or jasper (Quartz (SiO₂), potentially with iron-oxide inclusions) — mineral

Small quartz-rich stone, possibly iron-stained quartz or jasper

Quartz (SiO₂), potentially with iron-oxide inclusions

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

Quartz Crystal Rock

Silicon Dioxide (SiO2)

Quartz pebble with iron staining (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Quartz pebble with iron staining

Silicon dioxide (SiO2) with iron oxide impurities

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz-veined Basalt or Diabase Pebble (Igneous rock with hydrothermal quartz vein) — igneous

Quartz-veined Basalt or Diabase Pebble

Igneous rock with hydrothermal quartz vein

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Blue Apatite (Calcium Fluorophosphate (Ca5(PO4)3F)) — mineral

Blue Apatite

Calcium Fluorophosphate (Ca5(PO4)3F)

Amethyst (Amethyst (Silicon Dioxide - SiO2 with iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz vein specimen (Quartz (SiO₂), likely drusy or massive quartz on host rock) — mineral

Quartz vein specimen

Quartz (SiO₂), likely drusy or massive quartz on host rock

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

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

Quartz River Rock

Silicon Dioxide (SiO2)

Iron-stained quartz-rich rock (Milky quartz with limonite/goethite staining; possibly quartzite or silicified rock) — mineral

Iron-stained quartz-rich rock

Milky quartz with limonite/goethite staining; possibly quartzite or silicified rock

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

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(F,OH)2

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Tumbled amethyst (Amethyst, purple variety of quartz (SiO₂)) — mineral

Tumbled amethyst

Amethyst, purple variety of quartz (SiO₂)

Garnet in Host Rock (Garnet Group (A3B2(SiO4)3)) — metamorphic

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Iron-rich sulfide ore (likely pyrite-bearing rock) (Likely pyrite (FeS₂) with dark host rock; exact identification is uncertain from the image alone.) — mineral

Iron-rich sulfide ore (likely pyrite-bearing rock)

Likely pyrite (FeS₂) with dark host rock; exact identification is uncertain from the image alone.

Greenstone (Metabasalt) — metamorphic

Greenstone

Metabasalt

Likely milky quartz fragment (Quartz (SiO₂)) — mineral

Likely milky quartz fragment

Quartz (SiO₂)

Small weathered mineral/rock fragment (Uncertain from image; possibly quartz-rich sandstone or a feldspar-bearing rock) — mineral

Small weathered mineral/rock fragment

Uncertain from image; possibly quartz-rich sandstone or a feldspar-bearing rock

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz Boulder (Silicon Dioxide (SiO2)) — mineral

Quartz Boulder

Silicon Dioxide (SiO2)