Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
Basalt
Mafic Igneous Rock
Eclogite (retrograded)
Eclogite (Omphacite-Garnet rock)
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Shale
Fissile Mudstone (Shale)
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
Sandstone (Fluvial Pebble)
Arenite
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
Sandstone (Quartzose)
Arenite
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone (with Quartz Vein/Inclusion)
Arenite (primarily SiO2)
Sandstone (likely Graywacke or Lithic Arenite)
Clastic sedimentary rock predominantly composed of silicate grains
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
Sandstone (Red)
Arenite (primarily SiO2 with Iron Oxide staining)
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
Sandstone
Arenite (Secondary classification based on grain size)
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
Sandstone
Arenite (SiO2 primarily)
Geode Nodules / Chalcedony Geode
Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz
Agate Geode
Banded Chalcedony (Silicon Dioxide, SiO2) with Quartz crystals
Graphic Granite
Pegmatitic Granite (Quartz and Microcline K-Feldspar mixture)
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
Shale
Shale (Argillaceous sedimentary rock)
Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
Granite
Granite (composed of Quartz, Feldspar, and Mica)
Schist with Quartz Veins
Schist with Quartz (SiO2)
Sandstone
Arenite (primarily SiO2)