Tumbled jasper or brecciated jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and dark mineral inclusions
mineral
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone with Iron Oxide
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (likely Graywacke or Arkose)
Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)
sedimentary
Laterite
Laterite (Ferricrete)
sedimentary
Red Sandstone
Arenite
sedimentary
Yellow Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz with Schist Inclusion
Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist
metamorphic
Quartz-bearing rock or quartz-rich mineral specimen
Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image
mineral
Amber (Copal)
Succinite (fossilized resin)
mineral
Crazy Lace Agate
Chalcedony (SiO2) with microcrystalline quartz
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Amygdaloidal Basalt with Epidote
Vesicular Basalt with secondary Epidote/Quartz mineral infill
igneous
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Dalmatian Jasper
Dalmatian Stone (comprised of Feldspar, Quartz, and Arfvedsonite)
igneous
Likely weathered quartz-rich rock, possibly smoky quartz or chert
Quartz (SiO₂), though exact identification is uncertain from the photograph
mineral
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
African Turquoise
African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)
sedimentary
Chalcedony Nodule (Agate/Chert)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Unidentifiable Specimen
Undetermined
Unknown
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
mineral
Granite
Intrusive igneous felsic rock
igneous
Mica Schist with Pyrite
Mica Schist (FeS2 containing)
metamorphic
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Iron Hydroxide impurities
mineral
Milky Quartz Pebbles
Silicon Dioxide (SiO2)
mineral
Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
mineral
Orthoceras Fossil in Limestone
Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)
sedimentary
Siltstone with Fossil Cast
Sedimentary Rock (Siltstone / Fine-grained Sandstone)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic