Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Category
Industrial Byproduct (Anthropogenic Material)
Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.
Cinnabar in Quartz
Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)
mineral
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Sodalite
Sodalite (Sodium Aluminum Silicate Chloride) - Na8(Al6Si6O24)Cl2
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Pumice
Vesicular volcanic glass (primarily SiO2)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 principal composition)
sedimentary
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Quartz Vein Outcrop
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
sedimentary
Sandstone (with Iron Oxide)
Arenite with Limonite/Hematite staining
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sunstone
Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Coquina / Fossiliferous Limestone
Coquina (composed primarily of Calcium Carbonate / CaCO3)
sedimentary
Red Sandstone (Iron-rich Sandstone)
Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Zebra Jasper
Tumbled Opaque Chalcedony (SiO2)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral