Jasper
Silicon dioxide (SiO2)
sedimentary
Category
Sedimentary (Artificial)
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Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chalcedony (Common Opal or Agate)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite and Sunstone
Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)
mineral
Limonite
Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)
mineral
Carnelian
Carnelian (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Garnet
Garnet (X3Y2(SiO4)3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate/Carnelian type)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Banded metamorphic rock, likely gneiss
Biotite–quartz–feldspar gneiss, possibly amphibolite-bearing
metamorphic
Likely weathered gneiss
Foliated metamorphic rock, commonly quartz–feldspar–mica gneiss
metamorphic
Chert / Flint (Artifact)
Microcrystalline quartz (SiO2)
sedimentary
Red Siltstone
Siltstone
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Sandstone (Arenite)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Dalmatian Jasper
Dalmatian Stone (Aplite with Arfvedsonite)
igneous
Chert
Chert (Microcrystalline Silica, SiO2)
sedimentary
Banded Sandstone
Arenite (Sandstone with iron oxide banding)
sedimentary
Dalmatian Stone
Aplite (often incorrectly called Dalmatian Jasper)
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Limestone
Calcitic Limestone (CaCO3)
sedimentary
Limestone (Brecciated)
Calcium carbonate (CaCO3)
sedimentary
Quartz Veined Siltstone
Siltstone with Quartz (SiO2) intrusion
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Dalmation Stone
Peralkaline Rock (Microcline Quartz mixture with Arfvedsonite)
igneous