Apache Tear (Obsidian)
Volcanic glass (SiO2 - Silicon Dioxide)
igneous
Category
Mineral (Native Element Alloy)
Browse mineral (native element alloy) specimens identified by the Rock Identifier community.
Iron Meteorite
Iron-nickel alloy (primarily kamacite and taenite)
Meteorite (extraterrestrial material)
Iron Meteorite (Fragment)
Siderite (Iron-Nickel alloy: Kamacite and Taenite)
igneous
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (varieties: Flint or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Native Gold (in Jewelry form)
Gold (Au)
Mineral
Native Gold (in the form of jewelry)
Gold (Au)
mineral
Soapstone / Steatite
Steatite (primarily Talc, Mg3Si4O10(OH)2)
metamorphic
Iron Meteorite
Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary (microcrystalline silicate)
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Green Jasper
Silicon Dioxide (SiO2)
sedimentary
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Novaculite Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Conglomerate with Native Copper
Clastic Sedimentary Rock with Native Copper (Cu)
sedimentary
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
mineral
Gold and Cubic Zirconia (San Judas Tadeo Pendant)
Native Gold (Au) with Synthetic Cubic Zirconia (ZrO2)
mineral
Emerald
Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.
Mineral
Yellow Chert (Gold-toned Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite)
sedimentary
Obsidian
Volcanic Glass (SiO2, usually >70% silica content)
Igneous
Native Gold (in earring form)
Gold (Au)
mineral
Iron-Nickel Meteorite
Siderite (Iron Meteorite), primarily Fe-Ni alloy
igneous
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Obsidian
Volcanic glass (SiO2 + impurities)
igneous
Chert (White Chert or Flint)
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Iron Meteorite
Siderite (comprised primarily of Kamacite and Taenite alloys)
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Amazonite
Amazonite (KAlSi3O8, a variety of Microcline)
Mineral
Iron Meteorite
Siderite (Fe-Ni alloy, primarily Kamacite and Taenite)
igneous
Chert (Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)
Iron Meteorite Fragment
Siderite (Geological term for iron meteorite class - Fe/Ni alloy)
igneous
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Obsidian
Obsidian (Amorphous volcanic glass, SiO2 with impurities)
igneous