Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Category
Man Made (Synthetic Rock)
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)
sedimentary
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Gneiss
Gneiss
metamorphic
Basalt
Basalt
igneous
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Quartzite River Stone
Quartzite (SiO2)
metamorphic
Lapis Lazuli
Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Pink Quartzite Pebble
Metamorphic Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Sandstone
Arenite/Quartz Arenite
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Oolitic Limestone (Egg Stone)
Oolite (Chemical sedimentary rock, primarily CaCO3)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Agate (Moss or Plume Agate variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Metasomatized Granite)
metamorphic
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (often called Jasper or River Rock)
Chert (SiO2)
sedimentary
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Vesicular Basalt (Scoria)
Mafic extrusive volcanic rock (predominantly Plagioclase feldspar and Pyroxene)
igneous
Quartz Pebble (with Mica or Iron staining)
Silicon Dioxide (SiO2)
mineral
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
sedimentary
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
sedimentary
Jasper / Chert (River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
sedimentary
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary
Quartzite with Iron Inclusions
Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Meta-quartzite
metamorphic
Jasper (likely Lake Superior Jasper)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper (Iron-rich Microcrystalline Quartz)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary