Red Jasper
Silicon Dioxide (SiO2) - Chalcedony
mineral
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia
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Limestone
Calcium carbonate (CaCO3)
sedimentary
Jasper with Manganese Dendrites
Silicon Dioxide (SiO2) with Oxide Mineral Inclusions
sedimentary
Generic Rock / Pebble
Undetermined rock specimen
sedimentary
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions
mineral
Picture Jasper
Silicon Dioxide (SiO2) with impurities, microcrystalline quartz
sedimentary
Chalk
CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock
Sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide - NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Diorite
Diorite
igneous
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Fossilized Bone
Vertebrate Fossil Fragment (Calcium Phosphate / Hydroxyapatite)
fossil
Asphalt (Aggregate)
Bituminous macadam / Concrete Aggregate
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Ferric Hydroxide impurities
mineral
Red Jasper
Silicon dioxide (SiO2) with Iron inclusions
sedimentary
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Onyx (Dyed Agate)
Cryptocrystalline Quartz (SiO2) with artificial pigment
mineral
Petrified Wood (Silicified Wood)
Silicified Paleoflora (mainly Quartz, SiO2)
metamorphic
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Marble
Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.
Metamorphic Rock
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Anthracite Coal
Anthracite C
metamorphic
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Limonite after Pyrite (Prophecy Stone)
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Mineral pseudomorph
Red Jasper (River Siltstone)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon dioxide (SiO2)
Mineral
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
sedimentary
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Ferrous Slag
Fused calcium-iron silicates (Industrial Slag)
Anthropogenic/Industrial byproduct
Sandstone Pebble
Sandstone (SiO2 rich clastic rock)
sedimentary