Native Gold
Native Gold (Au)
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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Gold
Native Gold (Au)
mineral
Conglomerate
Sedimentary Conglomerate
sedimentary
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Shatter Cone (Impactite)
Shock-metamorphosed rock
metamorphic
Crinoid Stem Fragment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Calamites Fossil (Horsetail Stem)
Calamites (Genus), part of the class Equisetopsida
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Iron Meteorite
Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)
mineral
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Clastic sedimentary rock (composed mostly of SiO2)
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various lithic clasts)
sedimentary
Conglomerate
Clastic sedimentary rock (Polymictic Conglomerate)
sedimentary
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (Jasper)
Cryptocrystalline Silica (SiO2)
sedimentary
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions
sedimentary
Dendritic Jasper (Bumblebee like Agate)
Silicon Dioxide with inclusions (SiO2)
sedimentary
Chert (Limestone-based)
Silicon dioxide (SiO2)
sedimentary
Sandstone concretion (Ironstone-stained)
Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Bumblebee Jasper
Fossiliferous Calcite containing Orpiment and Realgar
sedimentary
Orthoceras Fossil
Orthoceras regulare (Class Cephalopoda, Order Orthocerida)
fossil
Conglomerate (or Breccia)
Clastic Sedimentary Rock (Conglomeratic)
sedimentary
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Conglomerate (River Rock)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sedimentary
Gastropod Steinkern (Fossil Snail Internal Mold)
Class Gastropoda (Internal Mold)
sedimentary