Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
Category
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
Shale
Fissile mudstone (Shale)
Rhodochrosite with Pyrite and Quartz
Manganese Carbonate (MnCO3)
Granite
Granitoid
Limestone
Calcium Carbonate (CaCO3)
Fluorite
Calcium Fluoride (CaF2)
Rhodochrosite
Manganese Carbonate (MnCO3)
Rhodochrosite
Manganese carbonate (MnCO3)
Rugose Coral (Horn Coral)
Order Rugosa (extinct fossilized coral)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Basalt (River Rock Cobble)
Extrusive mafic volcanic rock (Basalt)
Milky Quartz
Silicon dioxide (SiO2)
Gold (10K Alloy)
Aurum (Au) with alloying metals (Cu, Ag, Zn)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
Tree Agate
Silica (SiO2) with Chlorite inclusions
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
Pearl
Aragonite and Conchiolin (CaCO3 + organic protein)
Rhodonite
Rhodonite (Manganese silicate), (Mn,Fe,Mg,Ca)SiO3
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
Rose Quartz
SiO2 (Silicon Dioxide)
Quartz (River Cobble)
Silicon Dioxide (SiO2)
Green Jasper
Silicon Dioxide (SiO2) with impurities
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
Rhodochrosite
Manganese Carbonate (MnCO3)
Rhodochrosite
Manganese Carbonate (MnCO3)
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
Shale
Fissile mudstone (rich in clay minerals and quartz)
Jasper
Silicon dioxide (SiO2)
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Celestine (or Celestite) on Matrix
Celestine (SrSO4)
Red Sandstone
Arenite (Ferruginous Sandstone)
Tree Agate (also known as Dendritic Agate)
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Chert / Flint (a variety of Chert)
Chert (SiO2)