Yellow Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
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
View all →
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Micaceous schist
Mica schist, chiefly muscovite/biotite with quartz and feldspar
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Herkimer Diamond in Matrix
Quartz (SiO2) in Dolostone (CaMg(CO3)2)
sedimentary (host) / mineral (crystals)
Gabbro
Phaneritic Basic Igneous Rock
igneous
Fossilized Shark Tooth
Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)
sedimentary
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (SiO2 secondary)
sedimentary
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Quartzite
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
metamorphic
Serpentine-rich serpentinite pebble
Serpentinite, composed chiefly of serpentine-group minerals (lizardite, antigorite, chrysotile), commonly with magnetite and minor brucite
metamorphic
Hematite
Hematite (Fe2O3)
mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Small red-brown mineral or rock fragment
Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide
mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
River Siltstone / Mudstone Pebble
Siltstone (composed of mixed silicate and carbonate minerals)
sedimentary
Diorite
Intermediate Intrusive Igneous Rock
igneous
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Dalmatian Jasper
Peralkalic Quartz-Feldspar Porphyry
igneous
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Greenstone / Greenschist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Weathered Sandstone or Siltstone
Sedimentary Rock
sedimentary
Granite
Granite
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Igneous
Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Tumbled jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz (SiO₂) with iron-oxide and rock-fragment inclusions
mineral
Pegmatite (Granitic Pegmatite)
Pegmatite (Quartz + Potassium Feldspar + Mica)
igneous
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Fossilized Sand Dollar
Echinoidea (Clypeasteroida)
fossil
Greenstone
Greenschist (composed of actinolite, chlorite, and epidote)
metamorphic
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock