Scoria (Red Lava Rock)
Scoria (Mafic volcanic rock)
igneous
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
River Rock (Granite Cobble)
Granite (Felsic Plutonic Rock)
igneous
Epidosite (Epidote-Quartz rock)
Epidote-rich hydrothermal rock
metamorphic
Fire Opal in Host Rock
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
sedimentary
River Rock (Sandstone or Quartzite)
Clastic Sedimentary Rock / Quartzite
sedimentary
River Rock (Basalt or Siltstone)
Basalt (Aphanitic Igneous Rock)
igneous
Granite / Gneiss Ballast Rock
Granite (Quartzo-feldspathic rock)
igneous
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Quartz Druse (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (Quartz Sandstone)
sedimentary
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Porphyry
Porphyritic Igneous Rock
igneous
Vesicular Basalt (or Scoria)
Basalt (Aphanitic-Vesicular Mafic Igneous Rock)
igneous
Sandstone
Arenite (SiO2 based with quartz grains)
sedimentary
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Basalt River Pebble
Basalt (Mafic Volcanic Rock)
igneous
Basalt (River Stone)
Basalt
igneous
Basalt River Stones
Aphantic Mafic Igneous Rock (Basalt)
igneous
Chrysocolla and Azurite in Matrix
Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)
mineral
Limestone (Karst formation)
Calcium Carbonate (CaCO3)
sedimentary
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Slate/Schist
metamorphic
Basalt River Stone
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Geodude
Geodude (Rock Pokémon: No. 74)
igneous
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Weathered Basalt with Iron Staining
Mafic Igneous Rock
igneous
Serpentine
Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Unakite (or Epidote-rich Granite)
Unakite (Metamorphosed Granite consisting of Epidote, Orthoclase, and Quartz)
metamorphic
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
igneous
Granite Cobble
Granite
igneous
Granite
Granite (a plutonic rock)
Igneous
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 dominant)
sedimentary
Granite (Giallo Ornamental / Venetian Gold)
Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Banded Agate with Drusy Quartz
Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz
mineral