Galena
Lead Sulfide (PbS)
mineral
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
Learn about Mineral_rock in the encyclopedia
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Limonite
FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Graphite
Carbon (C)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
mineral
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Rounded river cobble, likely basaltic volcanic rock
Fine-grained mafic igneous rock; likely basalt or andesite
igneous
Fossil Snail
Gastropoda (fossilized)
fossil
Gneiss
Gneiss
metamorphic
Garnet-bearing granite or pegmatitic granitic rock
Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)
metamorphic
Sandstone (likely River-tumbled Picture Sandstone)
Arenite (predominantly SiO2 with iron oxide impurities)
sedimentary
Quartz Pebble
Crystalline Silica (SiO2)
sedimentary
Quartz (small fragment)
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar (Amazonite or White Feldspar)
KAlSi3O8
mineral
Biotite Schist
Schist (Biotite-dominated)
metamorphic
Bumblebee Jasper
Anhydrite-Aragonite mixture with Orpiment and Realgar
mineraloid
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Black Beach Pebble / Basalt Pebble
Basalt / Mafic Volcanic Rock
igneous
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite
Phaneritic Felsic Plutonic Rock
igneous
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Weathered iron-rich sandstone or lateritic rock
Quartz-rich sandstone with iron-oxide/hydroxide cement; possible goethite-bearing laterite
sedimentary
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Unable to identify - Image contains non-geological items
N/A
Quartz (Iron-Stained / Ferruginous Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
igneous
Fossilized Bone Fragment
Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Quartz with Limonite Staining
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
Mineral