Weathered granite or granitic gneiss pebble
Granite; primarily quartz, potassium feldspar, plagioclase, and mica
igneous
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
View all →
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Serpentine
Serpentinite (composed primarily of Mg3Si2O5(OH)4)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)
metamorphic
Granite
Intrusive Phaneritic Felsic Igneous Rock
igneous
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Pegmatitic granite
Granite, composed mainly of quartz, feldspar, and mica
igneous
Red Sandstone
Arenite (Fe2O3 rich)
sedimentary
Likely slate fragment
Slate; fine-grained foliated metamorphic rock composed mainly of clay minerals, quartz, and mica
metamorphic
Chert (specifically Banded Chert or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Dalmatian Jasper
Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions
igneous
Citrine or Yellow Quartz
Quartz (SiO2) with iron impurities
mineral
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
sedimentary
Garnet Schist
Almandine Garnet-bearing Mica Schist
metamorphic
Sandstone
Sandstone (SiO2-rich framework with variable matrix)
sedimentary
Sandstone pebble
Sandstone (SiO2 with iron oxides)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite Pebble
Quartzite (composed primarily of SiO2)
metamorphic
Obsidian
Obsidian (volcanic glass)
igneous
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Pink Granite
Phaneritic plutonic igneous rock (Alkali feldspar granite)
igneous
Red Quartzite Slipper Stone
Quartzite (SiO2)
metamorphic
Banded gneiss pebble
Foliated gneiss, typically quartz–feldspar–mica bearing
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Quartzite (Milky)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Basalt
Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)
igneous
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
sedimentary
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Basalt
Extrusive igneous rock
igneous
White Topaz
Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2
mineral
Quartzite
Quartzite (Metamorphic rock primarily composed of SiO2)
metamorphic
Quartzite
Metamorphic rock composed primarily of quartz (SiO2)
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic