Moissanite
Silicon Carbide (SiC)
mineral
Category
Marble
Browse marble specimens identified by the Rock Identifier community.
Chert (Banded)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Serpentine
Serpentinite (Mg3Si2O5(OH)4)
metamorphic
Chert (Field-collected specimen)
Chert (Crystalline Silica, SiO2)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Ironstone (Limonite/Hematite)
Ferruginous Sedimentary Rock (composed largely of Fe2O3 and FeO(OH)·nH2O)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Serpentine (Serpentinite)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Chert (specifically Gray Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (White Chert or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint nodules in limestone)
Silicon Dioxide (SiO2)
sedimentary
Chert
Chert (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Red Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Spiny Oyster Shell
Spondylus varians (Biogenic Calcium Carbonate)
mineral
Chert (Field Stone/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Crushed Limestone (Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline silicon dioxide, SiO2)
sedimentary
Favosites Fossil (Honeycomb Coral Pebble)
Favosites goldfussi / Silicified Coral Fossil
sedimentary
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Honeycomb Coral Fossil (Favosites)
Favosites alpenensis
sedimentary
Chert (Green variety)
Silicon Dioxide (SiO2)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Blue Caribbean Calite
Calcium Carbonate (CaCO3) with trace Aragonite
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (and Flint nodule)
Silicon Dioxide (SiO2)
sedimentary
Obsidian and Green Calcite
Volcanic Glass and Calcium Carbonate (CaCO3)
igneous and sedimentary/mineral
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)
sedimentary (fossil)
Sandstone (Quartz-rich)
Arenite (composed mainly of SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert Nodules (with Gryphaea or Shell inclusions)
Microcrystalline Quartz (SiO2) with Calcitic inclusions
sedimentary
Chert (specifically a flint nodule component)
Microcrystalline quartz (SiO2)
sedimentary