Heliodor (Yellow Beryl) / Greenish-Yellow Beryl
Beryl (Be3Al2Si6O18)
mineral
Category
Mineral (Native Element Alloy)
Browse mineral (native element alloy) specimens identified by the Rock Identifier community.
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Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Glacial Erratic Boulder (Sandstone / Granite)
Glacial Erratic / Sandstone (SiO2 dominated)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Yellow Chert (Gold-toned Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Obsidian
Volcanic Glass (SiO2, usually >70% silica content)
Igneous
Spinifex Textured Komatiite
Ultramafic Komatiite (with Olivine Spinifex)
igneous
Sulfur (Sulphur)
Sulfur (S8)
mineral
Gold and Diamond Jewelry
Native Gold (Au) and Diamond (C)
gemstone
Obsidian
Volcanic glass (SiO2 + impurities)
igneous
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Chert (Jasper / Flint)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Chert (White Chert or Flint)
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Black Jasper
Silicon dioxide (SiO2)
sedimentary
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Native American Hammerstone / Pitted Stone
Modified lithic artifact (often quartzite, basalt, or granite)
artifact / sedimentary or igneous rock
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Amazonite
Amazonite (KAlSi3O8, a variety of Microcline)
Mineral
Diamond
Carbon (C)
gemstone
Iron Meteorite
Siderite (comprised primarily of Kamacite and Taenite alloys)
igneous
Granite Glacial Erratic Boulder
Granite
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Chert (Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Iron-rich quartzite or ironstone
Ferruginous quartzite; predominantly quartz (SiO₂) with hematite/goethite (Fe₂O₃/FeO(OH))
metamorphic
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)
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
Iron-Nickel Meteorite
Siderite (Iron Meteorite), primarily Fe-Ni alloy
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)
Emerald
Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.
Mineral
Iron Meteorite Fragment
Siderite (Geological term for iron meteorite class - Fe/Ni alloy)
igneous
Turquoise
Hydrate phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Iron Meteorite
Siderite (Fe-Ni alloy, primarily Kamacite and Taenite)
igneous
Yellow Jasper with Red Inclusion
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary