Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Sapphire (likely blue synthetic sapphire or blue glass in a ring)
Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.
Mineral
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Greenstone (possibly Basalt or Greenschist)
Greenschist (composed primarily of chlorite, actinolite, and epidote)
Metamorphic (low-grade)
Geode (Unopened)
Siliceous Septarian Concretion / Geode (SiO2)
sedimentary
Schist
Crystalline Schist (often containing Muscovite, Biotte, or Quartz)
metamorphic
Jasper Agate (specifically Brecciated Jasper with Agate inclusions)
Silicon Dioxide (SiO2)
mineral
Gneiss (with Quartzite and Mica)
Gneiss
metamorphic
Chondrite Meteorite
Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)
Mineral
Quartz (specifically Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
Porphyritic Basalt (with Quartz or Calcite inclusion)
Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Biological Specimen (Domestic Dog)
Canis lupus familiaris
Organic (Non-rock)
Sandstone with Liesegang Rings
Arenite with Iron Oxide Concretions
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Conglomerate
Clastic sedimentary rock (Polymictic Conglomerate)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Gold (Elemental Metal)
Gold (Au)
Mineral
Coquina
Biogenic Limestone (CaCO3)
sedimentary
Kimberlite with Diamond
Kimberlite (Porphyritic Peridotite)
igneous
Granite fragment
Phaneritic Igneous Rock (Granitic composition)
igneous
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
mineral
Conglomerate (or Breccia)
Clastic Sedimentary Rock (Conglomeratic)
sedimentary