Demitasse Granite (Diorite-Granite transition)
Intermediate Plutonic Rock (Granodiorite/Diorite mix)
igneous
Category
Igneous, Sedimentary, And Metamorphic Mix
Browse igneous, sedimentary, and metamorphic mix specimens identified by the Rock Identifier community.
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Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Likely pink granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Diorite
Phaneritic Intermediate Plutonic Rock
igneous
Quartz geode or quartz-bearing rock
Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity
mineral
Weathered fine-grained stone, likely sandstone or quartzite
Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂
sedimentary
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Diorite
Intermediate intrusive igneous rock
igneous
Polished hematite bead (probable)
Hematite, Fe₂O₃
mineral
Volcanic Tuff (Breccia)
Pyroclastic Tuffaceous Rock
igneous
Diorite (or salt-and-pepper granite pebble)
Phaneritic Igneous Rock (Intermediate Composition)
igneous
River Siltstone Pebble
Siltstone (SiO2, Al2Si2O5(OH)4 mix)
sedimentary
Ironstone Nodules (Limonite/Hematite)
Goethite/Hematite mix (FeO(OH)/Fe2O3)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Pink granite
Granite, a quartz–feldspar plutonic rock
igneous
Jasper Conglomerate
Jasper-clast Conglomerate (SiO2)
sedimentary
Pietersite
Silicolite (brecciated tiger's eye with hawk's eye)
Mineral
Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Fancy Jasper
Chalcedony (SiO2)
sedimentary
Jasper and Agate (Polished Pebble)
Chalcedony (SiO2 with impurities)
Sedimentary
Sandstone (Greywacke)
Arenite / Lithic Wacke (SiO2 predominant)
sedimentary
Petrified Wood Agate
Silicified Wood (primarily SiO2)
fossil
Unakite
Epidotized Granite
metamorphic
River Pebbles and Cobbles
Mixed Siliciclastic Sediments (Quartzite, Chert, and Sandstone clasts)
sedimentary
Weathered conglomerate
Polymictic clast-supported conglomerate, with a sandy or finer-grained matrix
sedimentary
Agate (Plume or Moss Agate variant)
Chalcedony (SiO2) with various inclusions
mineral
Serpentine
Antigorite/Chrysotile/Lizardite mix - Mg3Si2O5(OH)4
metamorphic
Concrete
Anthropogenic Conglomerate
sedimentary
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Botryoidal Agate
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Weathered granite or granitic gneiss
Granite; predominantly quartz, feldspar, and mica (exact identification is uncertain from the image)
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Red Granite
Granite
igneous
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Polished orbicular granite (likely leopard-skin granite)
Orbicular granite; quartz + feldspar + biotite/amphibole, with mafic orbicules
igneous
Likely pink granite
Granite, a coarse-grained felsic intrusive igneous rock, typically quartz + feldspar + mica
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Honey-colored quartz cluster
Quartz, silicon dioxide (SiO₂), likely iron-stained or included quartz
mineral