Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Category
Synthetic Material (Not A Rock Or Mineral)
Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Sandstone (with Iron Staining)
Clastic sedimentary rock (High Silica / Iron Oxide)
sedimentary
Quartz Pebble (with Iron Inclusions)
Silicon Dioxide (SiO2)
mineral
Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Diorite (Dalmatian Stone)
Phaneritic Plutonic Diorite
igneous
Granite (Weathered)
Course-grained Intrusive Igneous Rock
igneous
Coral Fossil (Petrified Coral)
Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)
sedimentary
Unakite
Epidote-Feldspar rock
Metamorphic Rock
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Chert (Yellow Jasper/Quartzite Pebble)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Diorite
Intermediate plutonic igneous rock
Igneous
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
igneous
Diorite (Salt and Pepper Rock)
Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)
igneous
Basalt with vesicles
Vesicular Basalt
igneous
Limestone (Weathered Aggregate)
Sedimentary Carbonate Rock (CaCO3)
sedimentary
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Industrial byproduct (often confused with igneous rocks or meteorites)
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Coquina
Bioclastic Limestone
sedimentary
Fulonite (Fulgurite-like)
Fulgurite (SiO2 fused silica/lechatelierite)
Metamorphic (Pseudo-igneous)
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Turquoise and Red Coral
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)
mineral
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt (Vesicular)
Mafic Volcanic Rock (rich in Magnesium and Iron)
Igneous
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Scoria (Basaltic)
Vesicular Basalt
igneous
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Wood Paneling
Engineered Wood / Plywood Paneling
not a rock
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
sedimentary
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
mineral
Shale
Fissile mudrock (composed of clay-sized particles and detrital grains)
sedimentary