Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Basalt Pebble / River Stone
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granodiorite (Weathered)
Granodiorite
igneous
Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Granite River Rock
Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Crushed Granite and Basalt
Phaneritic Igneous Rock / Aphanitic Igneous Rock
igneous
Fossilized Shell Impression / Siltstone Fossil
Bivalvia / Brachiopoda mold in Siltstone
fossil
Amber-bearing Coal/Sedimentary Rock
Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)
sedimentary
Basalt
Aphanitic Mafic Volcanic Rock
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Granodiorite (Gneissic texture)
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Basalt (Vesicular)
Basalt (Extrusive Volcanic Rock)
igneous
Quartzite
Metamorphic Quartz Arenite
metamorphic
Quartz (or Chert/Flint)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous
Chert with Quartz Veining
Microcrystalline Silica (SiO2)
sedimentary
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Calcite (or Travertine / Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Scoria)
Basalt with vesicular texture
igneous
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
sedimentary
Red Sandstone
Arenite (Iron-rich)
sedimentary
Granite
Granite
igneous
Basalt with inclusion
Basalt (Aphanitic-Porphyritic texture)
igneous
Basalt with Scoria
Amygdaloidal Basalt / Vesicular Basalt
igneous
Druzy Quartz on Chert/Chalcedony
Silicon Dioxide (SiO2)
mineral
Geode with Quartz and possibly Jasper/Hematite
Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides
Mineral/Sedimentary Geode
Granite / Quartzite Specimen
Granite / Quartz (SiO2 with Feldspar and Mica)
igneous
Basalt Pebble (Vesicular / Beach Cobble)
Basalt (mafic extrusive igneous rock)
igneous
Jasper
Silicon dioxide (SiO2)
mineral
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Yellow Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic