Felsic Igneous Rock (likely Rhyolite or weathered Granite)
Felsic Volcanic/Plutonic Rock
igneous
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
Diorite
Intermediate plutonic igneous rock
Igneous
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Vesicular Basalt with Secondary Mineral Infill
Mafic Volcanic Rock (Basalt)
igneous
Diorite
Intermediate plutonic igneous rock
igneous
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Amber
Amber (C10H16O)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
igneous
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Red Granite
Phaneritic Felsic Igneous Rock
igneous
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Mineral
Bauxite / Iron-rich Laterite
Laterite (principally Al(OH)3, Fe2O3, and SiO2)
sedimentary
Vesicular Basalt with Quartz/Chalcedony
Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)
igneous
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Boxwork Quartz / Septarian Jasper
Boxwork (SiO2 with iron oxide inclusions)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Limonite Concretion (Ironstone)
Limonite / Goethite (FeO(OH)·nH2O)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
Igneous
Unakite (Epidotized Granite)
Epidote-Feldspar-Quartz Rock
metamorphic
Amethyst
Amethyst (SiO2 with Iron impurities)
mineral
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Vesicular Basalt (Lava Rock)
Aphanitic Mafic Igneous Rock
igneous
Banded Sandstone (Liesegang Rings)
Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)
sedimentary