Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Chondrite Meteorite
Ordinary Chondrite (L or H Type)
Mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
mineral
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Sandstone (Weathered)
Arenite (primarily SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
mineral
Native Gold Nugget
Native Gold (Au)
mineral
Greenstone Celt (Polished Stone Axe)
Metamorphosed mafic rock (often Basalt or Diabase)
metamorphic
Gold Nuggests
Native Gold (Au)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite treated with acid
mineral
River Cobble (Phyllite or Quartzite)
Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Fossilized Crab Carapace (Concretion)
Decapoda (fossil), typically preserved in calcite or siderite concretion
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Iridium sand or Osmium-Iridium nugget
Iridosmine / Osmiridium (Platinoid grouping)
mineral
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
mineral
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Granite Glacial Erratic
Intrusive Phaneritic Felsic Rock (Granite)
igneous
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Diamond
Native Carbon (C)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Silver (Jewelry Specimen)
Native Silver (Chemical Formula: Ag)
mineral
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Bismuth
Bismuth (Bi)
mineral