Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
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Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Geode (Unopened)
Silica-rich Concretion (primarily SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Hag Stone
Perforated Quartz Pebble / Sedimentary Rock
sedimentary
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Greywacke with Quartz Vein
Greywacke (immature sandstone) with SiO2 inclusions
sedimentary
Jasper pebble with vein quartz cross-cutting fractures
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides
mineral
Chalcedony (Agate)
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
sedimentary
Sandstone (Iron-stained)
Quartz Arenite with Iron Oxide Stain (SiO2 + Fe2O3)
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sandstone with Hematite staining
Arenite with Fe2O3 inclusions
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite
sedimentary
Gneiss
Gneiss
metamorphic
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Orange Calcite (likely polished specimen)
Calcite
Mineral
Green Jasper / Chert Pebbles
Microcrystalline Quartz (SiO2)
sedimentary
Green Jasper Pebble
Microcrystalline Quartz (SiO2) with impurities
sedimentary
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Polished orbicular granite (likely larvikite or orbicular diorite)
Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing
igneous
Chert (Green variety)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Serpentine
Serpentine group (subgroup Lizardite or Antigorite) - Mg3Si2O5(OH)4
metamorphic
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Druzy on Matrix (likely Agate or Jasper)
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Red Sandstone
Ferruginous Sandstone (formula varies, primarily SiO2 with Fe2O3)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Glacial Cobble with Granite Inclusion
Porphyritic Basalt or Andesite containing Granitic Xenolith
igneous
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite (primarily SiO2, silica)
sedimentary
Dalmatian Jasper
Peralkaline Rhyolite (composed of Quartz, Feldspar, and Arfvedsonite)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral