Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
Learn about Mineral Description (Anthropogenic Material) in the encyclopedia
View all →
Tumbled orange chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Tektite (Indochinite)
Natural glass (High-silica impact glass)
mineral
Red Siltstone
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Bumblebee Jasper
Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)
sedimentary
Sandstone (Arkose)
Arkose Sandstone (SiO2 with KAlSi3O8)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Likely schist, possibly serpentinite
Mica schist; potential chlorite–serpentine-rich metamorphic rock
metamorphic
Quartz-bearing iron-stained breccia
Brecciated quartz/quartzite with iron oxides, chiefly SiO₂ with hematite/goethite and possible feldspar or host-rock fragments
mineral
Mammoth or Mastodon Tooth Fragment
Mammuthus / Mammut molar fragment
fossil
Mosasaur Tooth Fossil
Mosasauridae (likely Prognathodon or Mosasaurus)
fossil
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Travertine
Travertine (CaCO3)
sedimentary
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8
mineral
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Bicolor Quartz Pebble
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Green Quartzite
Silicon Dioxide (SiO2) with mineral inclusions
metamorphic
Iron-rich laterite or limonite/goethite-bearing rock
Hydrated iron oxides, chiefly goethite (α-FeO(OH)) and limonite (FeO(OH)·nH₂O), likely in a lateritic matrix
mineral
Iron-rich weathered rock, likely limonite/goethite-bearing laterite
Limonite (variable hydrated iron oxides; chiefly goethite, α-FeO(OH))
mineral
Polished mahogany obsidian (likely)
Volcanic glass; primarily silica-rich rhyolitic glass (SiO₂), with iron oxides
igneous
Yellow Quartzite (Citrine-colored Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Turquoise (possible Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Tumbled quartz pebble
Quartz (SiO₂), likely milky or fractured rock crystal
mineral
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Iron-stained garnet-bearing rock, possibly almandine garnet
Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral