Agate Geode / Nodular Chalcedony
Silicon Dioxide (SiO2) with impurities
mineral
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Granite / Quartz with Mica inclusion
Granite (Plutonic Igneous Rock)
igneous
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Slate
Foliated Metamorphic Rock (composed of quartz, illite, chlorite)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Mica-rich schist
Quartz–muscovite/biotite schist
metamorphic
Dalmatian Stone
Dalmatian Jasper (not a true jasper, typically an igneous perthite)
igneous
Agate
Chalcedony (cryptocrystalline variety of Quartz, SiO2)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Green schist (probable chlorite–actinolite schist)
Chlorite–actinolite schist; commonly composed of chlorite, actinolite, epidote, albite, and quartz
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Gneiss (specifically a Granitic Gneiss specimen)
Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Quartzite
Quartzite
metamorphic
Granite
Granite
Igneous
Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Lapis Lazuli
Lapis Lazuli (Complex rock mainly composed of Lazurite, Calcite, and Pyrite)
metamorphic
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite (Polished Countertop Surface)
Plutonic Igneous Rock (Felsic)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Red Sandstone
Arenite with Iron Oxide (Hematite) cement
sedimentary
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Bauxite
Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)
sedimentary
Bauxite
Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
sedimentary
Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Red Sandstone
Clastic sedimentary rock (primarily Quartz with Hematite)
sedimentary