Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
Category
Browse sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate) specimens identified by the Rock Identifier community.
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Picture Jasper
Silicon dioxide (SiO2)
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Sandstone (Quartzose)
Arenite (SiO2 based)
Milky Quartz
Silicon Dioxide (SiO2)
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Chalcedony
Cryptocrystalline Quartz (SiO2)
Druzzy Quartz on Matrix
Silicon Dioxide (SiO2)
Orange Quartzite (Tumbled)
Quartzite (SiO2)
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Sandstone
Arenite
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
Gneiss
Gneiss (High-grade regional metamorphic rock)
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
Chert (Limestone-based)
Silicon dioxide (SiO2)
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
Chert (variant Flint/Jasper)
Microcrystalline Opaline Silica (SiO2)
Sandstone
Arenite (predominantly SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
Sandstone (likely Arkosic)
Arenite (SiO2 with KAlSi3O8)
Sandstone (Pebble)
Arenite / Clastic Sedimentary Rock
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
Sandstone
Arenite (primarily SiO2 with various cementing agents)
Sandstone
Arenite/Quartz Arenite
Shale
Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)
Chert / River Cobble
Microcrystalline Quartz (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Halite
Halite (NaCl)
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
Sandstone (Quartzose)
Arenite (primarily SiO2)