Limestone
Calcareous Sedimentary Rock (CaCO3)
sedimentary
Category
Not A Rock (Man Made Origin)
Browse not a rock (man made origin) specimens identified by the Rock Identifier community.
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Scoria (Lava Rock)
Scoria (Basaltic Scoria)
Igneous
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Basalt
Basalt (Vitreous to Aphanitic Mafic Igneous Rock)
igneous
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ferruginous Sandstone
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Serpentinite
Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)
metamorphic
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerative Sedimentary Rock
sedimentary
Basalt
Mafic Igneous Rock
igneous
Conglomerate (or Breccia)
Clastic Sedimentary Rock
sedimentary
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
River Pebble (Siltstone/Mudstone)
Clastic sedimentary rock
sedimentary
Slate
Foliated Metamorphic Rock
metamorphic
Greenstone Porphyry
Porphyritic Metavolcanic Rock
igneous
Gneiss
Gneissic Metamorphic Rock
metamorphic
Pumice or Scoria
Vesicular volcanic rock
Igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (Granite)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Unakite
Epidotized Granite
metamorphic
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Crushed Limestone (Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Plutonic felsic igneous rock
igneous