Ironstone Pebble
Sedimentary Ironstone (Hematite/Limonite-bearing)
sedimentary
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
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Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
sedimentary
Fossiliferous Sandstone (with Quartz patch)
Sedimentary Sandstone with Silicified Shell Fragments
sedimentary
Moqui Marble (Concretion)
Iron Oxide Concretion (Hematite-cemented Sandstone)
sedimentary
Sandstone (with ripple marks)
Arenite / Quartz Sandstone
sedimentary
Jasper
SiO2
Sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Sandstone (with Iron Oxide)
Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Banded sandstone pebble
Lithic or quartz-rich sandstone; exact composition requires testing
sedimentary
Bivalve Seashell Fossil
Class Bivalvia
fossil
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper and Hematite
Silicon Dioxide (SiO2) and Iron Oxide (Fe2O3)
mineral
Brown Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper or Ironstone concretion
SiO2 or Fe2O3
sedimentary or mineral
Aragonite Star Cluster (Cross-section)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Geode formation
mineral
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Painted Garden Rock
Coated Siltstone or Mudstone
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (Common Opal/Jasper transition)
Silicon Dioxide (SiO2)
sedimentary