Sandstone (Greywacke/Lithic Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Category
Sedimentary Rock
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Dalmatian Jasper
Peralkaline Feldspar Rhyolite
igneous
Wonderstone
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
igneous
Mica Schist (with Muscovite mica)
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Greywacke (River Siltstone)
Lithic Sandstone / Greywacke
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Flower Jasper
Agatized Fossil Coral / Chalcedony (SiO2)
sedimentary
Fossilized Turritella Gastropod (Internal Mold)
Turritella (Fossil Gastropod Crust)
sedimentary
Crinaudite / Fossilized Crinoid Stem
Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite or Aragonite)
sedimentary
Chert (Jasper/Mudstone variety with Oxidation)
Silicon dioxide (SiO2)
sedimentary
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2 with iron inclusions)
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
metamorphic
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Pink Chalcedony (Agate/Jasper blend)
Silicon Dioxide (SiO₂)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Mica Schist
Crystalline Schist (often containing Muscovite, Biotite, and Quartz)
metamorphic
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Fossilized Coral
Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)
sedimentary
Garnet in Schist (Garnetiferous Micaceous Schist)
Almandine Garnet, Fe3Al2(SiO4)3
metamorphic
Red Jasper (Brecciated Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Yellow Jasper
Silicon Dioxide with iron inclusions (SiO2)
sedimentary
Granite Gneiss
Gneiss (quartz-feldspar dominated)
metamorphic
Yellow Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Mookaite Jasper
Radiolarite (SiO2 with impurities)
sedimentary
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary