Quartz geode or quartz-bearing rock
Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity
mineral
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Quartz Druzy / Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Limonite Concretion
Goethite/Limonite (FeO(OH)·nH2O)
sedimentary
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Agate
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
mineral
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock (likely Sandstone or Mudstone)
Silicon Dioxide (SiO2) within Sedimentary Matrix
sedimentary
Sandstone (Yellow/Tan Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary
Quartz Pebble with Host Rock / Schist Matrix
Silicon Dioxide (SiO2) with Metamorphic Host Rock
sedimentary
Ironstone Nodules (Iron Concretion)
Siderite or Hematite Concretion
sedimentary
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Agate / Chalcedony Geode Nodule
Silicon Dioxide (SiO2)
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Mica Schist with Quartz
Crystalline Schist (SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Herkimer Diamond (Quartz Crystal)
Silicon Dioxide (SiO2)
mineral
Ironstone Nodule
Ferruginous Sandstone / Limonite Concretion
sedimentary
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (River Cobble)
Clastic Sedimentary Rock (primarily Quartz with Feldspar)
sedimentary
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Turquoise (set in silver jewelry)
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Tumbled sandstone pebble
Sandstone, primarily quartz (SiO₂) with feldspar and iron-oxide cement
sedimentary
Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz in Conglomerate Matrix
Silicon Dioxide (SiO2) within Clastic Sedimentary Rock
sedimentary
Hag Stone
Perforated Sedimentary Rock (typically Flint or Limestone)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Limitation Concretion
Ironstone Concretion (Goethite/Limonite)
sedimentary
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Sandstone
Arenite (SiO2 based typically)
sedimentary
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Sandstone (Banded)
Arenite (SiO2 with iron oxide impurities)
sedimentary