Basalt (River Rock Cobble)
Extrusive mafic igneous rock
Category
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
Basalt (River Rock Cobble)
Extrusive mafic igneous rock
Basalt with Vesicles
Vesicular Basalt
Serpentinite (often containing Jadeite/Nephrite)
Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4
Basalt
Extrusive mafic rock (Basalt)
Vesicular Basalt with Amygdaloidal Infill
Basalt (Mafic Extrusive Igneous Rock)
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
Basalt with Secondary Mineral Inclusions
Amygdaloidal Basalt (Mafic volcanic rock, primarily Augite and Plagioclase)
Basalt (with possible weathering or secondary mineral crust)
Basalt (Aphanitic Mafic Igneous Rock)
Basalt (Beach Pebble)
Extrusive mafic volcanic rock
Basalt
Basalt (Mafic volcanic rock)
Vesicular Basalt
Basalt with secondary mineral infilling (Amygdaloidal Basalt)
Basalt
Basalt
Basalt Pebble
Aphanitic Mafic Igneous Rock
Basalt
Extrusive mafic igneous rock
Basalt River Pebble
Basalt
Basalt (Vesicular or Scoriaceous)
Aphanitic Mafic Volcanic Rock
Basalt
Basalt (Mafic volcanic rock)
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
Basalt River Pebble
Basalt
Basalt River Cobble
Vitreous aphanitic Basalt
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (Basalt) with CaCO3
Vesicular Basalt
Extrusive mafic igneous rock
Basalt with Vesicular Texture
Basalt (SiO2 range 45-52%)
Basalt
Basalt (extrusive volcanic mafic rock)
Basalt with Scoria and potential Olivine/Pyroxene inclusions
Vesicular Basalt
Basalt
Basalt
Vesicular Basalt
Basalt (with vesicular texture)
Basalt River Pebble
Mafic Igneous Rock (Fine-grained Basalt)
Basalt Pebble
Basalt
Basalt
Basalt (Mafic volcanic rock)
Basalt River Pebble
Basalt (Mafic volcanic rock)
Coarse-grained Granite
Phaneritic Granite (contains Quartz, Feldspar, and Mica)
Basalt (River Pebble)
Extrusive Mafic Igneous Rock
River Pebble (Basalt)
Basalt (Aphanitic Mafic Igneous Rock)
Basalt
Basalt (Mafic volcanic rock)
Basalt
Basalt (composition: Plagioclase, Pyroxene, and Olivine)
Basalt with Iron Oxidation
Vesicular Basalt (Aphanitic Mafic Igneous Rock)
Vesicular Basalt with Xenocrysts
Mafic Igneous Plutonic/Extrusive Complex
Basalt
Basalt (Mafic volcanic rock)
Basalt (Vesicular)
Basalt (Extrusive Mafic Igneous Rock)