Septarian Nodule
Septarian Concretion (CaCO3 + Hydrated SiO2)
sedimentary
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Native Gold
Native Gold (Au)
mineral
Mica Schist
Mica Schist (with Muscovite)
metamorphic
Ironstone Concretion (Limonite/Goethite)
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Coral Fossil (Scleractinia)
Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
igneous
Fluorite Tower
Calcium Fluoride (CaF2)
mineral
Labradorite (White/Grey Labradorite)
Labradorite: (Ca, Na)(Al, Si)4O8
mineral
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz (Small fragments)
Silicon Dioxide (SiO2)
mineral
Moqui Marble (Sandstone Concretion)
Hematite-cemented Sandstone (Fe2O3 + SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)
sedimentary
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Chert (varietal Flint)
Silicon Dioxide (SiO2)
sedimentary
Green Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Brecciated Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Megalodon Tooth
Otodus megalodon
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Moqui Marble (Ironstone Concretion)
Goethite/Hematite Concretion (Fe2O3 / FeO(OH))
sedimentary
Chlorite Included Quartz
Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Li)6AlSi3O10(OH)8
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Sandstone
Arenite with Hematite (Fe2O3) cement
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Rainbow Moonstone with Black Tourmaline
White Labradorite with Schorl (Na,Ca)(Al,Si)4O8
mineral
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide Cement
sedimentary
Quartz (specifically Milky or Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Seraphinite
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
mineral
Bumblebee Jasper
Calcite-bearing Volcanic Tuff containing Orpiment (As2S3) and Realgar (As4S4)
sedimentary