Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Category
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
Basalt with Sulfide/Pyrite inclusion
Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
Yellow Jasper
Silica (Silicon Dioxide, SiO2) with iron inclusions
Chert (or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Granite Cobble
Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)
Quartzite
Quartzite (SiO2)
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
Chondrite Meteorite
Ordinary Chondrite (OC)
Flint (within Limestone matrix)
Silicon dioxide (SiO2)
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Petrified Wood
Silicified Wood (SiO2)
Diamond
Native Carbon (C)
Ocean Jasper Mushroom
Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)
Banded Flint (Chert)
Silicon Dioxide (SiO2)
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Honey Calcite (Yellow Calcite)
Calcium Carbonate (CaCO3)
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
Pegmatite with Smoky Quartz and Feldspar
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
Garnet (specifically Almandine or Pyrope)
Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3
Diamond
Carbon (C)
Basalt
Aphanitic Mafic Igneous Rock
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
Quartzite (River Pebble)
Metamorphic rock consisting primarily of Quartz (SiO2)
Coal (Bituminous or Anthracite)
Carbonaceous sedimentary rock (primarily Carbon, C)
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Aquamarine
Beryl (Be3Al2Si6O18)
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Quartz (Microcrystalline variety)
Silicon Dioxide (SiO2)
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Coquina Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Quartzite
Quartzite (primarily SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geode