Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
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Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Red Sandstone (Iron-rich)
Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)
sedimentary
Chert (Green variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodule
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Sandstone (with Iron Oxide)
Arenite with Limonite/Hematite staining
sedimentary
Ferruginous Sandstone (Ironstone)
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Jasper (Iron-stained Quartz)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper (Brecciated or Mottled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint variety)
Chert (SiO2)
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Ferruginous Chert
Microcrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Quartz Mineral Specimens
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Wonderstone (Banded Rhyolite)
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
igneous
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Gneiss
Gneiss
metamorphic
Specular Hematite
Hematite (Fe2O3)
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Rugose Coral (Horn Coral) Fossil in Limestone
Order Rugosa (commonly Grewingkia or Zaphrentis genus)
sedimentary
Fossiliferous Limestone with Brachiopod Mold
Calcium Carbonate (CaCO3) matrix containing Brachiopoda fossil impressions
sedimentary
Coquina / Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Chert (Brown variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper (Iron-stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (and Limestone Pebbles)
Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
metamorphic
Laterite
Laterite (Iron and aluminum-rich residual rock)
sedimentary
Gneiss
Gneiss
metamorphic
Geode (unopened)
Calcedony-lined Geode (SiO2)
sedimentary
K2 Jasper (K2 Granite)
Azurite in Granite (Biotite Granite with Azurite inclusions)
igneous
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Chert (Gold-toned Jasper)
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral