Jasper Geode
Silicon Dioxide (SiO2) with impurities
sedimentary
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
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Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Amygdaloidal Basalt
Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules
igneous
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Chalcedony (variations like Agate or Jasper)
Chalcedony (SiO₂ - microcrystalline quartz)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst Geode
Silicon Dioxide with trace inclusions of Iron (SiO2)
mineral
Blue Agate (likely dyed)
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Eye Agate / Chalcedony)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Chalcedony (Common Opal/Chert variety)
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite-Hematite-Chert)
sedimentary
Oolite or Oolitic Limestone
Oolitic Limestone (Principal mineral: Calcite, CaCO3)
sedimentary
Quartz (likely macrocrystalline variety)
Quartz (SiO₂)
Mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Agate (translucent pebble)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
mineral
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Jasper
Silicon dioxide (SiO2) with iron impurities
sedimentary
Flint (variety of Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Mookaite Jasper
Siliceous (chert) sedimentary rock, a form of Jasper
Sedimentary
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz
Quartz (SiO₂)
Mineral
Amethyst
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Agate
Chalcedony (SiO2)
mineral
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Botryoidal Chalcedony (Desert Rose / Grape Agate variant)
Silicon Dioxide (SiO2)
mineral
Orange Calcite (often commercially sold as Honey Calcite or Aragonite)
Calcium Carbonate (CaCO3)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate
Sedimentary Rock
Sandstone with Liesegang Rings
Clastic Sedimentary Rock with Iron Oxide Precipitates (SiO2 + Fe2O3)
sedimentary
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Jasper with Agate Inclusions
Silicon Dioxide (SiO2) - variety of Quartz/Chert
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Limonite)
mineral
Banded Iron Formation (Red Jasper and Hematite Chert)
Banded Iron Formation (BIF); Fe2O3 (Hematite) + SiO2 (Quartz/Jasper)
sedimentary