Sandstone (Pebble)
Arenite
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
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Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Granite Glacial Erratic
Intrusive Phaneritic Felsic Rock (Granite)
igneous
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Moss/Lichen Growth)
Sandstone (Quartz Arenite / Lithic Arenite)
sedimentary
Fluorite (Green Fluorite on Host Rock)
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite
sedimentary
Cubic Zirconia (Faceted)
Zirconium Dioxide (ZrO2)
mineral
Banded Calcite (Mexican Onyx)
Calcite (Calcium Carbonate, CaCO3)
mineral
Polished turquoise cabochon
Turquoise, hydrous copper-aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Iron-Nickel Meteorite Fragment (Unclassified)
Iron-Nickel Alloy (Taenite and Kamacite)
meteorite
Iron-Nickel Meteorite
Siderite (Meteoric Iron-Nickel alloy)
igneous
Iron Meteorite
Siderite (Meteoric Iron-Nickel alloy)
igneous
Banded Calcite
Calcium Carbonate (CaCO3)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Turquoise in Matrix
Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O
mineral
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Bismuth
Bismuth (Bi)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Iron Meteorite
Iron-nickel alloy (primarily kamacite and taenite)
Mineral/Rock (Extraterrestrial Origin)
Zebra Jasper
Tumbled Opaque Chalcedony (SiO2)
sedimentary
Diamond
Natural Carbon (C)
mineral
Native Gold (in the form of jewelry)
Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Quartz arenite / Lithic sandstone
sedimentary
Painted River Rock (likely Quartzite or Granite)
Quartzite or Granitic Gneiss (painted)
metamorphic
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
metamorphic
Chrysocolla-bearing copper ore
Chrysocolla (hydrated copper phyllosilicate; commonly approximated Cu₂H₂Si₂O₅(OH)₄·nH₂O), with possible malachite/limonite matrix
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Sandstone Geode (Unbroken)
Siliciclastic sedimentary rock (primarily Quartz)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O
mineral