Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
sedimentary
Category
Sedimentary (Anthropogenic)
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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
Rodonite
Rhodonite (MnSiO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Galena
Lead sulfide (PbS)
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
Carnelian Agate
Chalcedony (SiO2)
mineral
Rounded pebble, likely quartz-rich sandstone or weathered granite
Indeterminate lithic clast; possible granite or quartzose sandstone
igneous
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Banded Slate Pebble
Metamorphosed Mudstone / Slate
metamorphic
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone and Mixed Rock Assemblage
Clastic Sedimentary Rock / Quartz Arenite
sedimentary
Sandstone and Gravel Aggregate
Clastic Sedimentary Rock / Quartzose Sandstone
sedimentary
Pebble
Lithified rock fragment / Sedimentary clast
sedimentary
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Tumbled brown chert or jasper
Microcrystalline quartz (SiO₂), likely chalcedony/chert with iron-oxide impurities
sedimentary
Chert or silicified limestone fragment
Microcrystalline quartz (SiO₂), possibly calcareous chert
sedimentary
Polished red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
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 cabochon pendant
Jasper—opaque microcrystalline quartz/chalcedony, primarily SiO₂, colored red by iron oxides
gemstone
Red Jasper
Chalcedony (SiO2) with iron inclusions
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
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
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
Tumbled red-brown jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
sedimentary