Banded Slag Glass (Leland Blue/Frankfort Green style)
Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)
mineral
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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Native Copper
Native Copper (Cu)
mineral
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
mineral
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Vanadinite
Pb5(VO4)3Cl
mineral
Gold
Gold (Native Element); Au
mineral
Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Chert with Chalcedony/Quartz Vug
Cryptocrystalline Silica (SiO2)
sedimentary
Chalcedony (Grey/White Agate)
Silicon Dioxide (SiO₂)
mineral
Copper Ore
Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)
mineral
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Granite Thin Section
Granitic rock (Phaneritic texture)
igneous
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
man-made alloy (metallic)
Iron Meteorite (likely Chondrite or weathered Iron-Nickel)
Meteorite (Fe-Ni alloy & silicates)
igneous
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Sea Glass
Man-made silicate glass
sedimentary
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Copper ore, likely native copper in a host rock
Native copper (Cu), possibly with cuprite/iron-oxide matrix
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Green Aventurine (or Xiuyan Jade / Serpentine)
Silicon Dioxide (SiO2) with Fuchsite inclusions or Magnesium Silicate
metamorphic
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Silver (Native Element / Alloy)
Silver (Ag)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Bismuth
Native Bismuth (Bi)
mineral
Nutting Stone / Cupstone (Sandstone or Quartzite)
Sedimentary rock with anthropogenic modification (cupule)
sedimentary
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Copper
Native Copper (Cu)
mineral
Beryl (likely Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Silicon
Silicon (Si)
mineral
Yellow Aventurine
Silicon Dioxide (Quartz with inclusions), SiO2
mineral
Vanadinite on Barite
Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)
mineral
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Green Tourmaline (Verdelite)
Complex sodium iron aluminum borosilicate (Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH)4)
gemstone