Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Fossil Brachiopod or Mollusk Cast
Phylum Brachiopoda / Mollusca internal mold
fossil
Jasper Pebble
SiO2 (Microcrystalline Quartz)
sedimentary
Conglomerate
Pebble Conglomerate / Clastic Sedimentary Rock
sedimentary
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Mexican Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
mineral
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
sedimentary
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Quartz / Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amethyst and Agate Geode Section
Silicon Dioxide (SiO2) - Crystalline Quartz and Chalcedony
mineral
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Clastic sedimentary rock (composed mostly of SiO2)
sedimentary
Weathered yellow-brown rock fragment
Indeterminate; possibly iron-stained sandstone or weathered limestone
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
sedimentary
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Tumbled river pebble, likely limestone or weathered chert
Indeterminate carbonate/siliceous pebble; possible micritic limestone or chert
sedimentary
Liesegang Stone (Sandstone with Liesegang Rings)
Clastic sedimentary rock with li-secondary iron oxide mineralization
sedimentary
Chalcedony Geode / Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Sedimentary
Quartz Geode Fragment
Silicon dioxide (SiO2) within a nodule
sedimentary
Ironstone Concretion
Ironstone (Limonite/Goethite/Hematite mixture)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
sedimentary
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil