Blue Calcite
Calcium Carbonate (CaCO3)
mineral
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.
Serpentinite
Serpentinite
metamorphic
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Blue Chalcedony (Tumbled)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
metamorphic
Dyed Quartzite
Metamorphosed Quartz (SiO2) with synthetic pigment
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Igneous
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Basalt
Extrusive mafic igneous rock
igneous
Gneiss
Gneiss
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Puddingstone
Conglomerate
Sedimentary
Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
metamorphic
Flower Agate (Plume Agate)
Chalcedony (Silicon Dioxide) with Spherulitic Inclusions - SiO2
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenstone (Greenstone River Pebble)
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Granite
Felsic Intrusive Igneous Rock
igneous
Chert (or possibly Flint)
SiO2 (Silicon Dioxide)
Sedimentary Rock
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Schist
Crystalline Schist (often containing Muscovite, Biotte, or Quartz)
metamorphic
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Basalt
Basalt (principally Plagioclase and Pyroxene)
igneous
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Red Jasper with Quartz and Hematite
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary