Granite
Felsic intrusive igneous rock
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Granite
Felsic intrusive igneous rock
Nephrite Jade
Nephrite
Quartz Mineral
Silicon Dioxide (SiO2)
Gold Mineral
Native Gold (Au)
Quartz-rich pegmatite (likely feldspar–quartz rock)
Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining
Mica Schist / Granite
Mica Schist (Silicate metamorphic rock)
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
Copper Ore
Mixed copper sulfides/oxides in gangue matrix
Gravel and Pebbles
Unconsolidated rock fragments / detrital sediment
Fossilized Shark Tooth
Chondrichthyes (Class)
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
Granite
Granite (Plutonic Igneous Rock)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Gneiss
Gneiss (Metamorphic rock)
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Small pale mineral fragment
Unidentified; possibly quartz, calcite, or feldspar
Fluorite Tower
Fluorite (Calcium Fluoride - CaF2)
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Travertine
Calcium Carbonate (CaCO3)
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
Limonite / Goethite Ironstone
FeO(OH)·nH2O (Hydrous iron oxide)
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
Basalt with Vesicular Amygdule
Extrusive igneous rock (Mafic)
Gravel
Unconsolidated rock fragments / detrital sediment
Granite
Intrusive Igneous Rock (Felsic)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist, possibly with quartz and feldspar
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Granite (likely weathered granite or granitic gneiss)
Granite; chiefly quartz (SiO₂), feldspar, and mica
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Gneiss
Gneiss
Weathered mica schist (tentative)
Mica schist, likely muscovite–biotite schist with quartz and feldspar
Polished copper-bearing mineral specimen, likely malachite-rich copper ore
Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite
Fuchsite
Chromium-rich Muscovite Mica
Limonite Geode / Ironstone Concretion
Hydrated Iron Oxide (FeO(OH)·nH2O)
Azurite with Malachite
Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))