Quartz (Clear or Smoky)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Quartz Geode
Crystalline Silica (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Plume Agate or Moss Agate
Silicon dioxide (SiO2)
Mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Dendritic Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
gemstone
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (and Fossiliferous Chert)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (River Pebble)
Silicon Dioxide (SiO2)
mineral
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Sandstone Pebble
Arenite (SiO2 principal)
sedimentary
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Chert (Jasper/Pink Chert)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chert (Jasper focus)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (or Fossiliferous Limestone)
Microcrystalline Quartz (SiO2) / Calcium Carbonate (CaCO3)
sedimentary
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone Pebble
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone (Calcareous Sandstone)
Calcareous Sandstone (primarily SiO2 with CaCO3 cement)
sedimentary
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Basalt (River Stone)
Basalt
igneous
Jasper (specifically Chert/Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Amygdaloidal Basalt
Basalt with secondary mineral infilling (commonly SiO2 or Zeolites)
igneous
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Chert (and Chert Breccia)
Silicon Dioxide (SiO2)
sedimentary
Sandstone Pebble (River Rock)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
sedimentary