Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Category
Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)
Browse sedimentary rock (technically chert, a microcrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Technically Chert, A Microcrystalline Quartz) in the encyclopedia
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Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Mineral on Sedimentary Rock
Sandstone (likely Arkose)
Arenite (composed mainly of SiO2 with Feldspar)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Rock Crystal Quartz
Quartz (SiO₂)
Mineral
Quartz Geode
Quartz (Silicon Dioxide - SiO2) within a Chalcedony and Limonite shell
sedimentary
Rough Quartz (or Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (with iron oxide cement)
sedimentary
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Quartzite Pebble
Quartzite (principally SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
mineral
Amethyst Lace Agate / Banded Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Chert (Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz Vein in Metamorphic Rock
Quartzite or Schist host with Quartz (SiO2) intrusion
metamorphic
Chert (often called Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
metamorphic
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Yellow/Honey variety)
Microcrystalline Quartz (SiO2)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Pebble or Cobble (likely composed of sandstone or conglomerate)
Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)
Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)
Grape Agate (Amethystine Chalcedony)
Silicon Dioxide (SiO2) with impurities
mineral
Granular Sandstone
Arenite (variable composition, primarily SiO2)
sedimentary
Greywacke with Quartz Vein
Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Ironstone Gourd)
Limonite/Goethite Concretion (FeOO(H))
sedimentary
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral