Dalmatian Jasper
Peralkaline rhyolite
igneous
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Gneiss
Gneiss
metamorphic
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
metamorphic
Fossilized Coral
Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)
fossil
Peacock Ore
Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)
mineral
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Tumbled Stones (various)
Mixed Silica-based Minerals (primarily Quartz and Chalcedony)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Hematite (Botryoidal/Kidney Ore)
Iron(III) oxide (Fe2O3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende, chlorite, or manganese/iron oxides
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
mineral
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral
Quartz (Iron-stained River Pebble)
Silicon Dioxide (SiO2)
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Jasper (likely Polychrome or Ocean Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Greenstone
Metabasalt / Greenstone
metamorphic
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Amygdaloidal Basalt with Quartz
Basalt with Secondary Mineral Infilling
igneous
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Schist
Schist (Crystalline Metamorphic Rock)
metamorphic
Fossilized Bone (Petrified Bone)
Permineralized Bone Fossil
fossil
Granite
Felsic intrusive igneous rock
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Red Sandstone Pebble
Arenite (Iron-oxide stained)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (on Schist/Matrix)
Hematite (Alpha-Fe2O3)
mineral
Quartz (Smoky or Citrine variety)
Silicon Dioxide (SiO2)
mineral
Mudstone/Siltstone with Liesegang Bands
Argillaceous Sedimentary Rock with Chemical Banding
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Limonite
Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)
Mineral
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
River Cobble (Quartzite/Granite mix)
Quartzite-rich river stone
metamorphic
Septarian Nodule
Septarian Nodule (Calcite, Aragonite, and Limestone/Claystone)
sedimentary