Quartzite in Conglomerate
Clastic Sedimentary Rock with Silicon Dioxide (SiO2) inclusions
sedimentary
Category
Sedimentary Or Igneous (Host Environment)
Browse sedimentary or igneous (host environment) specimens identified by the Rock Identifier community.
River Pebble (Gravel)
Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)
sedimentary
Red Sandstone
Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite Cobble (River Stone)
Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)
igneous
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Green Kyanite
Kyanite (Al2SiO5)
mineral
Milky Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Cobble
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartzite Pebble (River Rock)
Quartzite (mainly SiO2)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.
SiO2 (Silicon Dioxide)
Mineral or Sedimentary (if chert)
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Graphite
Graphite (C)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Variant)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzite-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone Pebble
Arenite (primarily Quartz, SiO2)
sedimentary
Pyritic Mudstone
Argillaceous rock (FeS2)
sedimentary
Quartz Pebble (with Mica or Iron staining)
Silicon Dioxide (SiO2)
mineral
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Red Sandstone (with possible iron oxide staining)
Sandstone (primarily Quartz with Hematite/Goethite cement)
sedimentary
Jasper (Iron-rich Chert)
Silicon Dioxide (SiO2) with impurities of Hematite or Goethite
sedimentary
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
sedimentary
Granite (weathered)
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite (River-worn Cobble)
Phaneritic Felsic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
igneous
Quartzite River Pebble
Quartzite (principally SiO2)
metamorphic
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary