Basalt River Cobble
Basalt (Composition primarily Plagioclase Feldspar and Pyroxene)
igneous
Category
Not A Natural Rock
Browse not a natural rock specimens identified by the Rock Identifier community.
Vesicular Basalt (or Scoria)
Basalt (Aphanitic-Vesicular Mafic Igneous Rock)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Chert (potentially Flint or Mudstone)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
sedimentary
Sandstone (Tumbled/River Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fossil Coral (Rugose Coral Fragment)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Diamond
Diamond (C)
Mineral
Amber
Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)
mineral
Basalt
Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Scoria (Lava Rock)
Scoria (Basaltic Scoria)
Igneous
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Basalt
Basalt (Vitreous to Aphanitic Mafic Igneous Rock)
igneous
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Conglomerate (or Breccia)
Clastic Sedimentary Rock
sedimentary
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary
Basalt
Mafic Igneous Rock
igneous
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
River Pebble (Siltstone/Mudstone)
Clastic sedimentary rock
sedimentary
Granite
Granite (a plutonic rock)
Igneous
Basalt
Mafic Igneous Rock
igneous
Slate
Foliated Metamorphic Rock
metamorphic
Greenstone Porphyry
Porphyritic Metavolcanic Rock
igneous
Gneiss
Gneissic Metamorphic Rock
metamorphic
Vesicular Basalt
Mafic Igneous Rock
igneous
Pumice or Scoria
Vesicular volcanic rock
Igneous
Basalt (River Stone)
Mafic volcanic rock
igneous
Basalt
Mafic Volcanic Rock
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Vesicular Basalt
Extrusive mafic igneous rock
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Obsidian
Volcanic glass
igneous