Chert
Silicon dioxide (SiO2)
Sedimentary
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Specifically A Rock Composed Of Minerals) in the encyclopedia
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Pink Granite
Phaneritic intrusive igneous rock with Potassium Feldspar (KAlSi3O8) and Quartz (SiO2)
igneous
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Sandstone (Tumbled/River Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Shale / Mudstone
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Sandstone (Red)
Arenite (composed primarily of SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite pebble
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Granite / Quartz with Mica inclusion
Granite (Plutonic Igneous Rock)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Vesicular Basalt
Basalt (Mafic volcanic rock)
igneous
Andesite
Intermediate Volcanic Rock (Andesite)
igneous
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Ruby in Zoisite
Anyolite
metamorphic
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
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
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
igneous
Lapis Lazuli
Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)
gemstone
Peridotite
Ultramafic igneous rock
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, Chrysotile)
metamorphic
Greenstone / Serpentinite
Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)
metamorphic
Dalmatian Stone
Dalmatian Stone (formerly called Dalmatian Jasper)
igneous
Chert (Jasper-rich)
Silicon Dioxide (SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Lapis Lazuli
Complex rock composed mainly of lazurite, calcite, and pyrite
gemstone
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Granite
Granite
Igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive igneous rock
igneous
Bauxite
Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil