Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Specifically A Rock Composed Of Minerals) in the encyclopedia
View all →
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Sandstone
Arenite
sedimentary
Chert (specifically Flint or Common Chert node)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
sedimentary
Sandstone with Manganese Oxide Patina
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Weathered quartzite or quartz-rich sandstone
Quartzite, composed predominantly of quartz (SiO₂); field identification is uncertain from the photograph
metamorphic
Quartzite Pebble (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
metamorphic
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Polished tiger iron
Tiger iron: banded quartz–crocidolite/jasper–hematite rock
metamorphic
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Red Scoria (Volcanic Cinder)
Scoria (Extrusive Mafic Igneous Rock)
igneous
Red-and-green jasper
Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides and possibly chlorite/epidote
mineral
Granite-like rock
Coarse-grained felsic intrusive rock, likely granite or granodiorite
igneous
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Greenstone / altered mafic rock
Likely chlorite–actinolite schist or metabasalt; exact identification requires testing
metamorphic
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Granite
Phaneritic intrusive igneous rock (approx. 70 percent SiO2)
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Turquoise in Matrix
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Quartz (specifically Quartzite or Massive Quartz)
Silicon Dioxide (SiO2)
Mineral
Quartzite Pebble
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone (River Cobble)
Sandstone (principally composed of Quartz, SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Granite
Plutonic felsic igneous rock
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Small brown mineral fragment
Unidentified; the image lacks enough detail for a reliable species-level identification
mineral
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
Polished larvikite tower (likely)
Larvikite, a feldspar-rich monzonitic igneous rock
igneous
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
igneous
Polished granite pebble
Granite, a quartz–feldspar plutonic rock
igneous
Granite (likely)
Granite, a quartz–feldspar–mica intrusive igneous rock
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
gemstone
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
sedimentary
Greenstone (likely chlorite-rich greenschist)
Greenschist facies metamorphic rock, typically composed of chlorite, actinolite, and albite; exact identification requires testing
metamorphic