Granite
Intrusive igneous felsic rock
igneous
Category
Not A Rock (Man Made Origin)
Browse not a rock (man made origin) specimens identified by the Rock Identifier community.
Basalt
Basalt (Mafic volcanic rock)
igneous
Polished Basalt
Basalt (Mafic volcanic rock)
Igneous
Basalt with Quartz Veins
Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions
Igneous
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
mineral
Travertine (Calcareous Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Mineral
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Serpentine (Lizardite)
Serpentine subgroup, Mg3Si2O5(OH)4
metamorphic
Basalt River Cobble
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
metamorphic
Basalt
Basalt (composition of Plagioclase feldspar and Pyroxene)
igneous
Quartzite
Quartzite (SiO2-dominant rock)
metamorphic
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Basalt with Vesicles
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt
Mafic volcanic rock (Silicon dioxide 45-52%)
igneous
Limestone
Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (specifically Grainstone or Micrite)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
sedimentary
Conglomerate (or Breccia)
Clastic Sedimentary Rock (Conglomeratic)
sedimentary
Basalt
Basalt (Mafic Volcanic Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Porphyritic Basalt (or Andesite) Pebble
Porphyritic Mafic Volcanic Rock
igneous
Granite
Plutonic felsic igneous rock
igneous
Basalt
Basalt (extrusive volcanic rock)
igneous
Basalt
Extrusive Mafic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
River Rock (Quartzite)
Quartzite (SiO2)
metamorphic
Sandstone
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary