Basalt (River Stone)
Mafic Igneous Rock (composed of Plagioclase and Pyroxene)
igneous
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt Pebble
Extrusive mafic igneous rock
igneous
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt
igneous
River-worn Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Agate (Carnelian Agate with Quartz Matrix)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral/gemstone
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz (Cut and Polished Sphere)
Silicon Dioxide (SiO2)
mineral
Basalt (Beach Pebble)
Basalt
igneous
Gneiss
Metamorphic Gneiss
metamorphic
Sandstone Pebbles
Arenite
sedimentary
Vesicular Basalt
Vesicular Basalt (Mafic Volcanic Rock)
igneous
Basalt
Basalt (Extrusive Mafic Igneous)
igneous
Quartzite with Quartz Vein
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Red Quartzite Pebble
Quartzite (SiO2)
metamorphic
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Garnet Schist
Almandine Garnet in Micaceous Schist
metamorphic
Basalt Pebble
Basalt
igneous
Granite Water-Worn Pebble
Phaneritic Felsic Igneous Rock (Granite)
igneous
Unakite
Epidotized Granite
metamorphic
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide impurities)
sedimentary
Unakite
Unakite (Epidotized Granite)
metamorphic
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Basalt
Basalt
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Serpentinite
Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)
metamorphic
Basalt
Basalt (containing Pyroxene, Plagioclase feldspar, and Olivine)
igneous
Unakite
Unakite (Epidotized Granite)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Pumice
Pumicite
igneous
Vesicular Basalt
Vesicular Basalt (Aphanitic-Vesicular Mafic Rock)
igneous
Unakite
Epidotized Granite (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Pink Granite
Phaneritic Acidic Igneous Rock (Rich in K-feldspar)
igneous