Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Chert (Jasper/Quartzite river pebble)
Microcrystalline Silica (SiO2)
sedimentary
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Gneiss
Gneiss
Metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide cement
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Serpentine Jade (New Jade/Bowenite)
Antigorite (Mg3Si2O5(OH)4)
metamorphic
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Basalt with Iron Oxide staining
Basalt (Mafic volcanic rock)
igneous
Tiger's Eye (Unpolished)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Jasper (Iron-rich Chert)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic sedimentary rock)
sedimentary
Quartz (Milky to Clear)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Gold in Quartz Ore
Hydrothermal Quartz with native Gold (Au)
mineral
Quartz River Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Unakite
Epidotized Granite
metamorphic
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (Basalt) with CaCO3
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tourmaline
Complex Borosilicate - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite species)
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Gray Agate
Cryptocrystalline Quartz (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Zebra Marble
Metamorphosed Limestone (Recrystallized Calcite)
metamorphic
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Banded Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Crystalline Schist (often containing Muscovite, Biotte, or Quartz)
metamorphic
Quartz with Iron Oxide Monzonite or Sandstone contact
Quartz (SiO2) with Limonite/Hematite staining
mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Puddingstone
Polymictic Conglomerate
sedimentary