Scoria (Lava Rock)
Scoria (Extrusive Igneous Rock)
igneous
Category
Sedimentary Or Igneous
Browse sedimentary or igneous specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Igneous in the encyclopedia
View all →
Basalt (River Pebble)
Extrusive Mafic Igneous Rock
igneous
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Obsidian
Extrusive igneous volcanic glass
igneous
Granite
Phaneritic Plutonic Igneous Rock
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Basalt Pebble
Basalt (Extrusive Mafic Igneous)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Basalt (Road Aggregate / Crushed Stone)
Aphanitic Mafic Igneous Rock
igneous
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
Igneous
Granite
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
igneous
Granite
Granite (a common rock type, not a single mineral species)
Igneous
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)
mineral
Amethyst
Silicon Dioxide with trace Iron (SiO2)
mineral
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz River Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral