Tiger's Eye (Blue/Golden mix)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Category
Igneous, Sedimentary, And Metamorphic Mix
Browse igneous, sedimentary, and metamorphic mix specimens identified by the Rock Identifier community.
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Siltstone
Siltstone (SiO2, Fe2O3, Al2O3 mix)
sedimentary
Likely schist, possibly serpentinite
Mica schist; potential chlorite–serpentine-rich metamorphic rock
metamorphic
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Zebra Jasper (usually a trade name for Serpentine or Basalt blend)
Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4
metamorphic
Porphyritic granite (granite porphyry)
Quartz–feldspar porphyritic granite; mainly quartz, K-feldspar, plagioclase, and biotite/hornblende
igneous
Polished orbicular granite (likely leopard-skin granite)
Orbicular granite; quartz + feldspar + biotite/amphibole, with mafic orbicules
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
River Pebble (Gravel Pebble)
Stream-rounded Rock / Siliciclastic Pebble
sedimentary
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
sedimentary
Jasper Conglomerate
Jasper-clast Conglomerate (SiO2)
sedimentary
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Diorite
Intermediate intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Red Sandstone / Mudstone Nodules (L Liesegang rings)
Sedimentary Rock (Quartz/Hematite Clay Mix)
sedimentary
Fancy Jasper
Jasper (Cryptocrystalline Quartz, SiO2)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Pyrite in Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Botryoidal Agate
Silicon Dioxide (SiO2)
mineral
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Greywhacke (River Pebble)
Graywacke (immature sandstone)
sedimentary
Yellow Chalcedony (Agate/Jasper mix)
Silicon Dioxide (SiO2)
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Concrete or artificial stone core sample
Artificial conglomerate
sedimentary
River Cobble (Quartzite/Granite mix)
Quartzite-rich river stone
metamorphic
Demitasse Granite (Diorite-Granite transition)
Intermediate Plutonic Rock (Granodiorite/Diorite mix)
igneous
Rounded gray stone, likely slate or fine-grained sandstone
Probable slate (low-grade metamorphosed shale) or lithic sandstone; exact identification requires testing
sedimentary
Bumblebee Jasper (technically a type of Agate/Anhydrite)
Calcite and Anhydrite with inclusions of Realgar and Orpiment (As2S3)
sedimentary
Diorite
Intrusive Igneous Rock (Intermediate Composition)
igneous
Puddingstone (Polished Pebble)
Conglomerate (Quartz-rich)
sedimentary
Pumice
Pumice (a vesicular volcanic glass)
igneous
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Crushed Limestone
Sedimentary Calcite/Dolomite Rock (CaCO3)
sedimentary
Granite (with mafic xenolith)
Phaneritic Felsic Plutonic Rock
Igneous
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Diorite with Quartz Vein
Intermediate plutonic igneous rock (Diorite / Metagabbro with SiO2 quartz alteration)
igneous
Diorite
Phaneritic intermediate plutonic rock
Igneous