Sandstone
Arenite (SiO2 based with various mineral cements)
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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Vanadinite
Pb5(VO4)3Cl
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Bismuth
Native Bismuth (Bi)
mineral
Polished blue spotted stone, likely K2 stone
K2 stone: granite containing blue azurite spots; quartz–feldspar–biotite matrix
metamorphic
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Chert (Arrowhead/Projectile Point)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Arrowhead/Projectile Point)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Copper-bearing rock, possibly native copper in a weathered matrix
Likely copper minerals such as malachite (Cu₂CO₃(OH)₂) in an iron-rich host; exact identification is uncertain from the image
mineral
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Native copper
Copper (Cu), commonly with cuprite and malachite alteration
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Iron Meteorite
Siderite (Iron-Nickel Alloy)
meteorite
Iron Meteorite
Siderite (Iron-Nickel Alloy)
meteorite
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Vanadinite on Barite
Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)
mineral
Calcite crystal cluster
Calcite (calcium carbonate, CaCO₃)
mineral
Copper ore, likely native copper in a host rock
Native copper (Cu), possibly with cuprite/iron-oxide matrix
mineral
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed predominantly of sand-sized grains, 0.0625 to 2 mm)
sedimentary
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Hag Stone (Sandstone with Boreholes)
Bored Sandstone (Sedimentary rock with lithophaga-style borings)
sedimentary
Bumblebee Jasper
Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)
sedimentary
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
mineral
Iron Meteorite
Siderite (Iron-Nickel Alloy)
meteorite
Iron Meteorite
Siderite (Iron-Nickel alloy)
meteorite
Iron Meteorite
Siderite (Iron-Nickel alloy)
meteorite
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral