Basalt Pebble
Basalt
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Basalt Pebble
Basalt
Vesicular Basalt
Basalt
Chert (Iron-Stained)
Microcrystalline Silica (SiO2)
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Complex silicate rock)
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
Granite
Felsic intrusive igneous rock
Basalt
Extrusive Igneous Rock
Gneiss
Gneiss (High-grade metamorphic rock)
Banded Sandstone
Arenite (with iron oxide banding)
Sandstone (Wonderstone)
Arenite (composed primarily of SiO2 with Fe2O3 impurities)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
Sandstone (Banded Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with iron oxide impurities)
Sandstone
Arenite (composed primarily of SiO2)
Basalt
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
Basalt
Basalt (Extrusive Igneous Rock)
Basalt (with Porphyritic Texture)
Basalt
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
Basalt
Basalt (silicate rock primarily plagioclase and pyroxene)
Basalt
Basalt
Basalt
Basalt (Extrusive Mafic Igneous)
Basalt
Extrusive mafic igneous rock
Basalt
Basalt (containing plagioclase feldspar, pyroxene, and olivine)
Basalt
Basalt (Mafic volcanic rock)
Quartz Vein in Sandstone
Quartz (SiO2) in Clastic Sedimentary Rock
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Granite
Phaneritic Felsic Igneous Rock
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
Granite
Intrusive Igneous Rock
Sandstone Pebble
Sandstone (primarily SiO2)
Weathered granitoid (likely granite or granitic gneiss)
Granite; chiefly quartz, feldspar, and mica (exact identification uncertain from the photo)
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Sandstone
Arenite
Sandstone
Arenite (SiO2 primarily)
Basalt Pebble
Mafic Igneous Rock
Basalt
Mafic volcanic rock
Basalt River Stone
Basaltic Igneous Rock
Granite Pebble
Intrusive Igneous Rock
Basalt
Basalt
Pumice
Pumice (Volcanic glass / Felsic igneous rock)
Vesicular Basalt
Extrusive mafic igneous rock (Basalt with vesicular texture)
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)