Shark Tooth Fossil
Lamniformes (Shark tooth fossil composed of Fluorapatite)
fossil
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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Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Red Jasper (Beach Pebble)
SiO2 (Microcrystalline Quartz with Hematite inclusions)
sedimentary
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Siltstone
Siltstone (primarily composed of quartz and clay minerals)
sedimentary
Pebble (likely Quartzite or Chert)
Clastic Sediment, potentially composed of SiO₂ (Quartz)
Mineral, Sediment
Dalmatian Stone and Lapis Lazuli
Dalmatian Stone (Felsic Igneous Rock) with Lapis Lazuli
igneous
Granite
Felsic intrusive igneous rock
igneous
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Foliated metamorphic rock, likely gneiss or mica schist
Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph
metamorphic
Serpentine-rich serpentinite pebble
Serpentinite, composed chiefly of serpentine-group minerals (lizardite, antigorite, chrysotile), commonly with magnetite and minor brucite
metamorphic
Sandstone and Gravel Aggregate
Clastic Sedimentary Rock / Quartzose Sandstone
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Sandstone
Clastic sedimentary rock composed mainly of quartz sand
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Banded Gneiss (Metamorphic Rock)
metamorphic
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Greenstone
Greenschist (composed of actinolite, chlorite, and epidote)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Granite Pebble
Intrusive Igneous Rock
igneous
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
Sedimentary
Quartzite
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite (River-worn)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
metamorphic
Red Quartzite River Stone
Metamorphic Rock (composed mainly of Quartz, SiO2)
metamorphic
Yellow Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Granodiorite
Phaneritic intrusive igneous rock (intermediate composition)
igneous
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary