Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary (secondary classification for a weathered mineral specimen)
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert with Desert Varnish
Cryptocrystalline Quartz (SiO2) with Manganese/Iron oxide coating
sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Red Jasper (SiO2)
sedimentary
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
mineral
Jasper (Sedimentary variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Dyed Agate
SiO2 (Silicon Dioxide) - Chalcedony variety
Mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Anthracite Coal
Anthracite (Carbon)
sedimentary
Banded Agate
Cryptocrystalline Silica (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Anthracite Coal
Anthracite
metamorphic
Chert (specifically Flint or Jasper-Chert)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2 with Iron impurities)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Chert (Agate/Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert / Flint (River Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Dyed Agate
Silicon Dioxide with artificial pigment (SiO2)
sedimentary
Pink Aragonite
CaCO3
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper Breccia
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Coral (Precious Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Black Jasper (Black Onyx substitute)
Silicon Dioxide (SiO2) with carbonaceous impurities
sedimentary (microcrystalline quartz)
White Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Phyllite
Phyllite (Foliated metamorphic rock)
metamorphic