Yellow Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
White Quartz (Carved Star)
Silicon Dioxide (SiO2)
mineral
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
mineral
Quartz geode
Microcrystalline quartz (SiO₂), commonly with chalcedony and possible calcite inclusions
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chalcedony (Botryoidal Agate vein)
Chalcedony (Microcrystalline Quartz) - SiO2
mineral
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-oxide inclusions (SiO2 primarily)
sedimentary
Rounded brown river pebble
Likely weathered sandstone or iron-stained quartz-rich rock; exact identification requires testing
sedimentary
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Sandstone Concretion
Septarian Concretion (Nodule)
sedimentary
Quartz Druzy Geode
Silicon Dioxide (SiO2) - Crystalline Variety
mineral
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony
mineral
Jasper and Quartz Pebble
Silicon dioxide (SiO2) microcrystalline quartz
sedimentary
Quartz Pebble (River Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (primarily Quartz SiO₂ with Hematite Fe₂O₃ staining)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Mookaite Jasper
Silicon Dioxide (SiO2) - Radiolarite
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz geode
Quartz (SiO₂), likely in a chalcedony or other silica-rich host rind
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Quartz Vein in Matrix (Breccia / Host Rock with Quartz)
Silicon Dioxide (SiO2) in Host Rock Matrix
metamorphic
Sandstone concretion
Arenite sedimentary rock (concretion/nodule)
sedimentary
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Witch Stone (Hag Stone)
Perforated Sedimentary Rock (Typically Sandstone or Limestone)
sedimentary
Biotite-rich schist
Mica schist; primarily quartz, feldspar, and biotite mica
metamorphic
Ferruginous Sandstone
Arenite with Iron-oxide cement (composed of Quartz and Limonite/Hematite)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
igneous
Granite Gneiss
Gneiss (containing quartz, alkali feldspar, plagioclase, biotite/amphibole)
metamorphic