Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
Sandstone
Arenite (primarily SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Sandstone Concretion with Quartz Center
Sedimentary Clastic Rock (SiO2 matrix with Quartz core)
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)
Sandstone
Arenite (SiO2 principal)
Sandstone
Sandstone (various mineral compositions)
Murex Fossil
Muricidae (Calcium Carbonate fossilization)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone (likely Quartzose)
Arenite
Coarse Sandstone
Arenite (SiO2 based)
Quartz Geode with Goethite/Hematite
Silicon Dioxide (SiO2) with Iron Oxides
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
Sandstone (Red)
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Sandstone
Arenite (Sedimentary Rock)
Concretion (Sandstone)
Sandstone Concretion
Sandstone (likely Arkosic)
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 based)
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)
Sandstone
Arenite (SiO2 based)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
Bumblebee Jasper
Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)
Sandstone
Arenite
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Turquoise
CuAl6(PO4)4(OH)8·4H2O
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
Sandstone
Clastic sedimentary rock (SiO2 primary)
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
Sandstone (Quartzite Pebble)
Arenite (SiO2)
Gossan (with Limonite/Hematite coating)
Ferruginous Gossan (Fe2O3·nH2O / Fe2O3)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite
Gneiss (specifically Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Sandstone
Arenite (SiO2 + various cementing minerals)
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Concretion
Septarian Concretion