Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Category
Sedimentary
Browse sedimentary specimens identified by the Rock Identifier community.
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Carnelian Agate
Chalcedony (SiO2)
mineral
Dendritic Siltstone
Siltstone with Manganese Dendrites (MnO2)
sedimentary
Banded Slate Pebble
Metamorphosed Mudstone / Slate
metamorphic
Small brown quartz-rich pebble, possibly chert or jasper
Microcrystalline quartz (SiO₂), tentative
mineral
Red Jasper or Iron-rich Sandstone
SiO2 with Fe2O3 inclusions (if Jasper) or Arenite (if Sandstone)
sedimentary
Jasper
SiO2
Mineral
Geode Nodule Fragment
Quartz / Chalcedony Nodule
sedimentary
Brecciated Jasper or Agatized Dinosaur Bone
SiO2
gemstone
Orange Calcite
Calcite (CaCO3)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Rodonite
Rhodonite (MnSiO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Galena
Lead sulfide (PbS)
mineral
Sandstone
Arenite (Silicon Dioxide with various mineral cements)
sedimentary
Chert
Chert (Microcrystalline Quartz)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Tumbled yellow jasper or chert
Microcrystalline quartz (SiO₂), likely iron-oxide-stained chalcedony/chert
mineral
Tumbled sandstone pebble
Quartz-rich sandstone, commonly subarkose or arkose
sedimentary
Banded Ironstone / Jasper Siltstone
Siltstone with Iron Oxide Hydrates (SiO2 with Fe2O3/FeO(OH))
sedimentary
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
sedimentary
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Red jasper cabochon pendant
Jasper—opaque microcrystalline quartz/chalcedony, primarily SiO₂, colored red by iron oxides
gemstone
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
mineral
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly weathered chert or chalcedony
mineral
Red Jasper
Silicon Dioxide (SiO2 with Hematite inclusions)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Limonite inclusions
sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Chalcedony (SiO2) with iron inclusions
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 composition primarily)
sedimentary
Fossil Brachiopod or Mollusk Cast
Phylum Brachiopoda / Mollusca internal mold
fossil
Red jasper (likely iron-rich chert)
Microcrystalline quartz (SiO₂) colored by hematite/goethite; possibly ferruginous chert
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Calcareous or Siliceous Matrix
mineral