Gold Nugget
Native Gold (Au)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Secondary Classification For A Weathered Mineral Specimen) in the encyclopedia
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Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pink Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
igneous
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
sedimentary
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Iron Meteorite
Iron-nickel alloy (primarily kamacite and taenite)
Mineral/Rock (Extraterrestrial Origin)
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Bauxite
Bauxite (Principal ore of aluminum; mixture of minerals including Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Silica (SiO2)
sedimentary
Ferruginous Sandstone (with Laterite)
Ferruginous Arenite (FeO(OH)·nH2O)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodules
Chert (Silicon Dioxide, SiO2)
sedimentary
Amygdaloidal Basalt
Vesicular-Amygdaloidal Basalt (Mafic Extrusive)
igneous
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Arkose)
Arkose Sandstone (SiO2 with KAlSi3O8)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Agate slice
Chalcedony (SiO2)
mineral
Blue Chalcedony
Chalcedony (SiO2)
mineral
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Banded Sandstone (River Pebble)
Arenite (SiO2 primarily)
sedimentary
Basalt with Amygdules
Amygdaloidal Basalt
igneous
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone with Quartz Veins
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Flint (Chert)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz (Gravel fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Stromatolite (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary