Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
metamorphic
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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Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Serpentinite
Serpentinite (composed largely of Serpentine minerals such as Lizardite, Antigorite, and Chrysotile: Mg3Si2O5(OH)4)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Agate Geode Slice with Druzy Quartz
Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Weathered gray sandstone or siltstone cobble
Clastic sedimentary rock, likely quartz-rich sandstone/siltstone (diagnosis uncertain from image)
sedimentary
Turquoise in Matrix
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Hag Stone
Perforated Flint or Chert (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Diorite
Intermediate Phaneritic Igneous Rock (Diorite)
igneous
Quartzite river pebble
Quartzite (SiO2)
metamorphic
Polished white quartz-rich pebble
Microcrystalline quartz (SiO₂), likely milky quartz or quartzite
mineral
Bauxite
Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Quartz Sandstone / Iron-stained Sandstone)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone with Manganese Oxide Patina
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)
metamorphic
Granite fragment
Granite (Felsic intrusive igneous rock)
igneous
Greenschist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
metamorphic
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
metamorphic
Serpentinite
Serpentinite (composed mainly of Serpentine-group minerals: (Mg, Fe)3Si2O5(OH)4)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
Igneous
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Sandstone (specifically Lithic or Quartz Arenite)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Botryoidal Chalcedony / Quartz
Silicon Dioxide (SiO2)
mineral
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Siltstone
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary