Baryte (Barite)
Barium sulfate (BaSO4)
mineral
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Chert Nodule
Microcrystalline Silica (SiO2)
sedimentary
Gneiss (specifically a water-worn pebble)
Gneiss
metamorphic
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Arrowhead/Tool variety)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Hag Stone
Perforated Sandstone (composed of SiO2 and calcareous cement)
sedimentary
Limonite/Ironstone
Limonite (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Mineral
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Carnelian
Chalcedony (SiO₂)
mineral
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
River Cobble (likely Serpentinite or Greenstone)
Serpentinite / Greenschist facies rock
metamorphic
Quartz
Quartz (SiO2)
Mineral
Banded Slag Glass (Leland Blue/Frankfort Green style)
Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)
mineral
Baroque Pearl
Calcium Carbonate (Aragonite or Calcite) and Conchiolin
Organic Gemstone
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Ferruginous Sandstone (with Laterite)
Ferruginous Arenite (FeO(OH)·nH2O)
sedimentary
Chert (Arrowhead Debitage or Flake)
Microcrystalline silica (SiO2)
sedimentary
Chalcedony (Milky Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Mineral
Hematite
Hematite, Iron(III) oxide (Fe2O3)
mineral
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Quartz Vein in Matrix
Silicon Dioxide (SiO2)
mineral
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Chert (Nodule)
Chert (variety of microcrystalline quartz, SiO2)
sedimentary