Banded ironstone pebble
Banded iron formation (BIF), chiefly quartz/chert and iron oxides; possibly hematite–magnetite-rich jasper
sedimentary
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
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Banded iron formation (iron-rich chert), possibly jasper
Banded iron formation; alternating microcrystalline quartz (SiO₂) and iron oxides/hydroxides (hematite, magnetite, goethite)
sedimentary
Banded iron formation fragment (iron-rich chert/jasper)
Banded iron formation; microcrystalline quartz (SiO₂) with hematite/magnetite and iron oxides
sedimentary
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Coquina Limestone (Fossiliferous Limestone)
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Quartz-rich iron-stained rock, likely quartzite or quartz vein material
Quartz (SiO₂), with iron oxides/hydroxides such as hematite and goethite
metamorphic
Chert / Chalcedony Nodules
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Blue calcite (probable)
Calcite, calcium carbonate (CaCO₃)
mineral
Banded iron formation pebble (likely jasper-rich ironstone)
Banded iron formation (BIF), composed mainly of hematite/magnetite and microcrystalline quartz (chert/jasper)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Weathered metallic sulfide-bearing rock, possibly pyrite-rich ore
Tentatively pyrite (FeS₂) with iron oxides and host rock; exact identification requires testing
mineral
Quartz Geode / Druzy Quartz Node
Silicon Dioxide (SiO2)
sedimentary
Ironstone Nodule
Ironstone (Ferruginous Rock)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Chert Nodule (with Geode cavity)
Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
Mineral
Banded iron formation fragment
BIF; hematite–magnetite–chert/quartz assemblage
sedimentary
Pyrite (likely)
Iron disulfide, FeS₂; commonly called fool’s gold
mineral
Yellow calcite fragment
Calcite (CaCO₃), likely honey/yellow calcite
mineral
Red Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Red Quartzite River Rock
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartzite pebble with Quartz Vein
Metamorphic Quartzite (SiO2) with Quartz Veining
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Chalcedony (specifically Agate or Flint)
Silicon Dioxide (SiO₂)
Mineral
Gold
Native Gold (Au)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper (Red/Brown)
Microcrystalline Quartz (SiO2) with Iron Oxide inclusions
sedimentary
Iron-rich metamorphic rock, likely magnetite–hematite-bearing ironstone
Banded or massive iron formation (BIF), chiefly hematite (Fe₂O₃) and magnetite (Fe₃O₄), with quartz and possible iron silicates
metamorphic
Barite Rose on Marcasite
Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)
mineral
Ironstone concretion
Iron-oxide-rich concretion, chiefly goethite (FeO(OH)) and/or hematite (Fe₂O₃) cementing sediment
sedimentary
Ironstone pebble (likely limonite/goethite-rich)
Limonite, a mixture of hydrated iron oxides; commonly dominated by goethite (α-FeO(OH))
sedimentary
Quartz with Host Rock
SiO2 (Quartz) with fine-grained Matrix
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (Taconite/Itabirite)
sedimentary
Oolitic Chert
Silicon Dioxide (SiO2) with oolitic texture
sedimentary