Sandstone
Arenite (SiO2 based)
sedimentary
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
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Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Coprolite
Coprolite
sedimentary
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Tourmalinated Quartz
Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Granite Pegmatite
Coarse-grained Granite (SiO2 - Aluminum and Alkalies)
igneous
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Shale
Sedimentary rock composed of clay minerals and quartz
sedimentary
Shale
Argillite / Shaly Mudstone
sedimentary
Sandstone (Lithic Arenite)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Prehnite
Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
mineral
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Travertine (Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Garden Quartz (Phantom Quartz)
Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)
mineral
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
sedimentary
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (Microcline)
mineral
Sandstone
Arenite (predominantly SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and mineral impurities
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Red Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral