Milky Quartz with Iron Staining
Crystalline Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
sedimentary
Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Diamond
Diamond (Pure Carbon, C)
Mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Diamond (set in jewelry)
Diamond (Carbon, C)
mineral
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond jewelry
Diamond (crystalline carbon, C)
gemstone
Gastropod Fossil (Steinkern)
Class Gastropoda (internal mold)
fossil
Diamond
Carbon (C)
gemstone
Diamond (Faceted)
Diamond (Carbon, C)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Sandstone (Tumbled / Rounded)
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (primarily SiO2 with Feldspar)
sedimentary
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Likely small metallic meteorite fragments
Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image
meteorite
Pink Coral
Corallium rubrum (or related species, composed of calcium carbonate)
gemstone
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Pink faceted gemstone, likely synthetic ruby or pink sapphire
Corundum (Al₂O₃), possibly chromium-colored ruby; synthetic origin likely
gemstone
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Gold Nuggests
Native Gold (Au)
mineral
Sandstone
Sedimentary Clastic Rock
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone