Banded Iron Formation
BIF (Banded Iron Formation)
sedimentary
Category
Not A Geological Specimen
Browse not a geological specimen specimens identified by the Rock Identifier community.
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Moqui Marble (Ironstone Concretion)
Goethite/Hematite Concretion (Fe2O3 / FeO(OH))
sedimentary
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Everest
Canis lupus familiaris (Siberian Husky)
not a rock (animated character)
Glauconite (Greensand)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Limestone with Calcite
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Citrine Quartz Geode
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Calcite (often sold as Yellow Aragonite or Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
mineral
Carnelian (Flame Polished)
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Dragon Blood Jasper (Epidote with Piedmontite or Quartz)
Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
metamorphic
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Dyed Agate
SiO2
mineral
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead Artifact)
Chert (SiO2)
sedimentary
Quartzite Pebble
Metamorphic rock primarily composed of Silicon Dioxide (SiO2)
metamorphic
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Limonite/Goethite)
Iron-rich sedimentary rock (FeOx)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Orbicular Jasper (Ocean Jasper)
Silica-rich Microcrystalline Quartz (SiO2) with various inclusions
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Water-worn)
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
River Cobble (likely Metasedimentary or Basalt)
Metamorphosed Siltstone or Altered Fine-grained Igneous Rock
metamorphic
Calamites Fossill (Lepidodendrales)
Calamites sp. (Family Calamitaceae)
sedimentary
Glacial Cobbles (predominantly Granite and Gneiss)
Mixed lithologies (Quartz, Feldspar, Mica assemblage)
igneous and metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Quartzite Cobble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic