Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)
Mineral
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Popcorn
Zea mays everta (P. Wilson) (Botanical name for the corn variety)
Organic/Biogenic
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Ferruginous Sandstone (Grit)
Clastic Sedimentary (Ironstone-rich Sandstone)
sedimentary
Arid Sandy Loam
Arenosols / Regosols
sedimentary
River Cobble (Conglomerate context)
Unconsolidated Fluvial Alluvium (comprised of various lithologies like Quartzite, Granite, or Basalt)
sedimentary
Black Obsidian
Obsidian, volcanic glass (Amorphous SiO₂)
Igneous Rock
Granitic Pegmatite with Schorl
Granitic Pegmatite (Schorl: NaFe3Al6(Si6O18)(BO3)3(OH)3OH)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limestone (specifically Grainstone or Micrite)
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Stainless Steel Spoon
Iron-Chromium Alloy (Fe + Cr + Ni)
mineral-based human-made alloy
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2 inclusions)
mineral
Pegmatite (Granitic) with Tourmaline
Granitic Pegmatite (containing Schorl and Quartz)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granitic Pegmatite
Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase
igneous
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rutile in Quartz (Rutilated Quartz)
SiO2 with TiO2 inclusions
Mineral
Gneiss
Gneiss
metamorphic
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
igneous
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Gneiss
Gneiss
metamorphic
Sunstone
Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Ferruginous Sandstone (Ironstone Conglomerate fragments)
Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Lepidolite in Quartz (or Lepidolite Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Quartz (SiO2)
igneous