Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartzite with Quartz Vein
Metamorphosed Quartz-rich Arenite (SiO2)
metamorphic
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Granite
Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
mineral
Quartzite Pebble (with Iron Inclusions)
Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)
metamorphic
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Amygdaloidal Basalt
Amygdaloidal Basalt (with secondary mineral infilling)
igneous
Granodiorite Pebble
Granodiorite
igneous
Carnelian Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Green Aventurine (Gua Sha tool)
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Rhodonite
Rhodonite (MnSiO3)
Mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Sandstone (Ferruginous)
Arenite (with high iron oxide content)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Greenstone
Greenschist / Meta-basalt
metamorphic
Granite
Granite (Phaneritic Igneous Rock)
igneous
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)
Silicon Dioxide (SiO2) with various inclusions
mineral
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Greenstone
Metabasalt
metamorphic
Lapis Lazuli (Fragment)
Lazurite-rich metamorphic rock
metamorphic
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
Sedimentary
Quartz with Schist Inclusion
Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist
metamorphic
Peacock Ore (Bornite or Iridescent Chalcopyrite)
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation
mineral
Slate with Quartz
Low-grade Metamorphic Slate with SiO2 inclusions
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Geode (unopened)
Calcedony-lined Geode (SiO2)
sedimentary
Green Aventurine (Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
metamorphic
Porphyritic Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous