Fancy Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Category
Anthropogenic Sedimentary Style Organic Solid
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Jasper (Imperial Jasper style)
Silicon Dioxide (SiO2) with impurities
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
mineral
River Cobbles (Basalt, Quartzite, and Sandstone mix)
Fluvial detritus (primarily SiO2, Plagioclase, and Pyroxene mix)
Mixed: Igneous and Sedimentary
Yellow Aventurine (or Citrine-colored Quartz)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
mineral
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Puddingstone
Polymictic Conglomerate
sedimentary
Jasper Conglomerate
Jasper-clast Conglomerate (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
metamorphic
Green Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Belemnite Fossil
Belemnitella sp. (rostrum)
fossil
Weathered iron-rich sandstone or laterite fragment
Ferruginous sandstone, chiefly quartz (SiO₂) cemented or stained by iron oxides/hydroxides
sedimentary
Unopened Geode
Geode (containing various mineralization like Quartz SiO2)
sedimentary
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
sedimentary
Limonite/Goethite Concretion
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or volcanic shell
mineral
Garnet-bearing Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Black Onyx
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Black Onyx
Chalcedony (Silicon Dioxide - SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Amethyst Geode
Silicon Dioxide with trace inclusions of Iron (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Hematite Nodules (Moqui Marbles style)
Iron Oxide (Fe2O3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral