Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite with Iron Banding
Metamorphosed Quartz-rich Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Ferruginous Quartzite (Red Quartz)
Quartzite (SiO2 with Hematite/Iron impurities)
metamorphic
Quartzite (with Metamorphic Foliation)
Quartzite (Recrystallized SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Iridescent Ammonite
Ammonoidea (Species: likely Cleoniceras or Desmoceras); Mineral: Aragonite/Ammolite (CaCO3)
sedimentary (fossilized)
Vesicular Basalt
Basalt (principally Plagioclase and Pyroxene)
igneous
River Cobble (Conglomerate context)
Unconsolidated Fluvial Alluvium (comprised of various lithologies like Quartzite, Granite, or Basalt)
sedimentary
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Greenstone
Greenschist (composed of actinolite, chlorite, and epidote)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Scoria (Red Lava Rock)
Scoria (Vesicular basaltic rock)
Igneous
Gabbro
Gabbro (Mafic Plutonic Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt with Iron Oxidation
Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Yellow Chalcedony (likely carnelian or yellow agate)
Silicon Dioxide (SiO₂)
mineral
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Greenstone / Diorite
Intermediate plutonic igneous rock
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Andesite Porphyry
Porphyritic Andesite
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt with Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Granite Pebble
Granite
igneous