Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide impurities
sedimentary (chemical)
Category
Sedimentary (Chemical
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Jasper (likely Polychrome or Mookaite variants)
Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions
sedimentary (chemically precipitated)
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary (chemically precipitated)
Jasper with Pyrite (Gold-colored inclusions)
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
sedimentary (chemical/biological)
Jasper (Milky/Cream Variety)
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary (chemical/biological)
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Black Chert (Flint / Basanite)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary (chemically precipitated mineral)
Jasper (with orbicular/unakitoid tendencies)
Silicon Dioxide (SiO2) with iron and epidote inclusions
sedimentary (chemically precipitated) or metamorphic
Iron Ore / Hematite / Ironstone Nodule
Hematite / Goethite (Fe2O3 / FeO(OH))
sedimentary
Hematite (specular hematite/massive hematite)
Hematite, iron(III) oxide (Fe₂O₃)
mineral
Likely hematite-rich iron ore
Hematite, Fe₂O₃, possibly mixed with magnetite or other iron oxides
mineral
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
sedimentary (chemical/biological origin)
Jasper (likely a variety of Yellow or Mustard Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary (chemically precipitated mineral)
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral impurities
sedimentary (chemical/biological origin)
Red Jasper (Plum or Brick variety)
Silicon Dioxide (SiO2) with iron oxide inclusions (Hematite)
sedimentary (chemical/biological origin)
Polished black stone, likely hematite
Hematite (Fe₂O₃), possibly magnetite or a hematite-rich ironstone
mineral
Bumblebee Jasper (technically a type of Agate/Anhydrite)
Calcite and Anhydrite with inclusions of Realgar and Orpiment (As2S3)
sedimentary
Jasper (Wonderstone/Banded Jasper)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary (chemical/biological origin) or volcanic-related metamorphic
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert/Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Travertine (Tufa)
Chemical Sedimentary Rock (CaCO3)
sedimentary
Travertine (Tufa)
Chemical Sedimentary Limestone (CaCO3)
sedimentary
Chert
Microcrystalline or cryptocrystalline quartz
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Jasper/Mudstone variety with Oxidation)
Silicon dioxide (SiO2)
sedimentary
Limonite/Goethite Concretion
Goethite (FeO(OH))
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Chert
Chert (Microcrystalline Quartz)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
sedimentary
Chert (Flint / Chalcedony pebble)
Silicon Dioxide (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Banded)
Silicon Dioxide (SiO2)
sedimentary
Travertine (Tufa)
Chemical Limestone (CaCO3)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Chert (or Flint)
Chert (SiO2)
sedimentary
Iron-rich rock or Concretion
Ironstone or Limonite concretion
sedimentary