Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Anthropogenic (Man Made Product Subject To Geological Processes)
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper Conglomerate
Jasperoid Conglomerate (predominantly SiO2 with iron oxide impurities)
sedimentary
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Limonite (with goethite)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert (specifically a fragment with Desert Varnish)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Jasper variation)
Silicon dioxide (SiO2)
sedimentary
Diamond inlaid in Jewelry
Carbon (C)
mineral
Corundum (Sapphire in Host Rock)
Corundum (Aluminum Oxide, Al2O3)
mineral
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Banded Iron Formation
Banded Iron Formation (BIF)
Sedimentary Rock
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Anthracite Coal
Anthracite (a variety of coal, predominantly carbon)
Sedimentary Rock (Metamorphosed)
Gold Nugget
Native Gold (Au)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Quartz (Smoky/Milky variant)
Silicon Dioxide (SiO2)
mineral
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt
igneous
Satin Spar (Gypsum)
Hydrous calcium sulfate (CaSO4·2H2O)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Native Sulfur
Sulfur (S8)
mineral
Rough Quartz
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) containing a Rugosa (Horn Coral) fossil
sedimentary
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
sedimentary
Diamond (in a cluster setting)
Crystallized Carbon (C)
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic