Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
Epidote in Matrix
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Jasper Agate
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (likely River-tumbled Picture Sandstone)
Arenite (predominantly SiO2 with iron oxide impurities)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond
Native Carbon (C)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Gold (Elemental Metal)
Gold (Au)
Mineral
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Stichtite in Serpentine (Atlantasite)
Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4
metamorphic
Diamond
Diamond (pure Carbon, C)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Libyan Desert Glass
Impactite (vitreous silica), SiO2
mineral
Diamond (in Matrix)
Carbon (C)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Gypsum (Wallboard/Drywall)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
sedimentary
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Mineral
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities), SiO2
mineral
Amethyst
Amethyst (Silica mineral, SiO2)
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (vibrant yellowish-brown iron oxide)
Limonite (FeO(OH)·nH2O)
mineral
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with manganese staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary