Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Category
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
Granite
Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)
Fossil Coral (Rugose Coral Fragment)
Rugosa (extinct order of solitary and colonial corals)
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Mookaite Jasper
Silicified Radiolarite (SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Quartzite
Quartzite (primarily SiO2)
Kyanite (Blue Kyanite)
Kyanite (Al2SiO5)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (primarily SiO2)
Polygenetic Breccia
Clastic Breccia (containing lithic fragments in a fine-grained matrix)
Chalcedony (Botryoidal or Agate nodule)
Silicon Dioxide (SiO2)
Quartz Calcite Vug in Limestone
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2) inclusions
Granite
Granite (Felsic Plutonic Rock)
Peridot in Matrix
Olivine ((Mg,Fe)2SiO4)
Mica Schist
Mica Schist (primarily Muscovite or Biotite)
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
Quartzite
Metamorphic Quartz Rock (SiO2)
Banded Chert / Agate
Silicon Dioxide (SiO2)
Basalt
Basalt (Extrusive Igneous Rock)
Red Garnet
Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)
Lepidodendron Plant Fossil
Lepidodendron sp. (Lycopodiophyta)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Greenstone
Metamorphic mafic rock (greenschist facies)
Chert / Jasper
Cryptocrystalline Quartz (SiO2)
Basalt
Basalt (Mafic volcanic rock)
Quartz with Mica Schist Matrix
Quartz (SiO2) in Mica Schist Matrix
Quartzite Pebbles
Meta-quartzite (SiO2)
Brown Agate
Cryptocrystalline Quartz (SiO2)
Orange calcite
Calcite (CaCO₃), likely honey/orange calcite
Slate
Foliated Metamorphic Rock (composed of quartz, illite, chlorite)
Granite
Granite (Felsic Intrusive Igneous Rock)
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
Epidosite
Epidosite (Metasomatic calcium-aluminum silicate rock)
Diamond
C
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)