Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (Microcrystalline quartz, SiO2 with iron oxide impurities)
sedimentary
Sulfur
Sulfur (S8)
mineral
Jasper or Red Quartzite
SiO2 (Silicon Dioxide with iron oxide impurities)
sedimentary or metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz with Chlorite inclusions
SiO2 with (Mg,Fe)3(Si,Al)4O10(OH)2⋅(Mg,Fe)3(OH)6
mineral
Blue calcite
Calcite (CaCO₃), blue variety
mineral
Jasper
Silicon dioxide (SiO2) with iron impurities
sedimentary
Iron-rich jasper or ferruginous chert
Microcrystalline quartz (SiO₂) stained by iron oxides, chiefly hematite and goethite
sedimentary
Banded chert pebble
Chert (microcrystalline quartz, SiO₂), likely ribbon-banded chert
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Sandstone (Liesegang Rings)
Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)
sedimentary
Chert Nodule / Ironstone Concretion
Microcrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Honey-colored calcite
Calcite (calcium carbonate, CaCO₃), likely rough or partly polished
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
sedimentary
Red Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Red Jasper (River Pebble)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral
Weathered quartz-rich rock, likely feldspathic quartzite or quartz vein fragment
Quartzite dominated by quartz (SiO₂), with probable feldspar and iron-oxide staining
metamorphic
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Orange Calcite (Polished Sphere)
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone
Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)
fossil
Blue calcite
Calcite (CaCO₃), likely blue calcite with white carbonate matrix
mineral
Red Quartzite River Rock
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Hematite
Hematite (Fe2O3)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Quartzite (or Chert/Flint gravel)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Polished honey calcite heart
Calcite (calcium carbonate, CaCO₃)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral