Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Category
Mineral (Metal)
Browse mineral (metal) specimens identified by the Rock Identifier community.
Beryl (Variety Mix)
Be3Al2(Si6O18)
Mineral
Porphyritic Basalt
Porphyritic Basalt (with plagioclase phenocrysts)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Dolerite (Diabase)
Dolerite / Diabase
igneous
Chert (Lightly weathered variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Rose Quartz
Rose Quartz (SiO₂)
mineral
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
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)
Diamond
Diamond (pure Carbon, C)
mineral
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Iron Meteorite
Iron-nickel alloy (e.g., Kamacite, Taenite)
Meteorite (extraterrestrial material)
Iron-Nickel Meteorite (Possible Chondrite or Oxidized Iron)
Siderite (Nickel-Iron) or Chondrite (Si/Fe composite)
igneous
Chert (Basanite / Flint)
Microcrystalline silica (SiO2)
sedimentary
Bismuth
Bismuth (Bi)
Mineral
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Synthetic (glass)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Dolomite
Dolomite (CaMg(CO3)2)
Mineral
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Serpentinite
Serpentinite (a rock composed predominantly of serpentine group minerals)
metamorphic
Greisen
Greisen
Metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Synthetic Glass
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
mineraloid / anthropogenic (man-made origin)
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Mineraloid / Synthetic Glass
Pyrite
Iron Pyrite (FeS2)
Mineral
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Diamond
Diamond (pure carbon; C)
Mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral