Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Category
Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)
Browse sedimentary rock (technically a microcrystalline quartz mineral aggregate) specimens identified by the Rock Identifier community.
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Travertine
Terrestrial Sedimentary Rock (CaCO3)
sedimentary
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Ocean Jasper
Silicon dioxide with impurities (SiO2 + impurities)
sedimentary
Basalt with Quartz/Feldspar Inclusion
Basalt (containing Silicate minerals such as SiO2 and (Ca,Na)(Al,Si)4O8)
igneous
Conglomerate
Polymictic Conglomerate
sedimentary
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Biotite Schist
Biotite Schist
Metamorphic
Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Clear Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
mineral
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)
mineral
Shale
Fissile Mudrock (Clay-rich Sedimentary Rock)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Agate (Thunderegg segment)
Silicon dioxide (SiO2) - Microcrystalline Quartz/Chalcedony
mineral
Green Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 principal)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Ferruginous Sandstone (with possible Epidote/Chlorite coloring)
Sandstone (SiO2 dominated with Fe2O3 staining)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
mineral
Ferruginous Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Basalt (River Pebble)
Extrusive mafic igneous rock
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Chalcedony (specifically Agate or Carnelian pebble)
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
mineral