Sandstone
Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)
sedimentary
Category
Not A Rock Or Mineral (Anthropogenic Material)
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Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone (with Chert/Quartzite)
Arenite (SiO2 primarily)
sedimentary
Granite
Granite
Igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (Arenite)
sedimentary
Sandstone (Quartz-rich)
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 dominated with minor feldspar/clay)
sedimentary
Banded gneiss
Gneiss, chiefly quartz–feldspar–mica (variable composition)
metamorphic
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Red Sandstone (Iron-rich)
Arenite (with Hematite cement)
sedimentary
Banded Siltstone
Banded Siltstone / Laminated Siltstone
sedimentary
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Banded metamorphic rock, likely mica schist or gneiss
Quartz–feldspar–mica schist/gneiss; exact identification requires a fresh surface and mineral tests
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Seashell Fossil
Gastropoda fossil
fossil
Picture Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Quartz-bearing iron-stained breccia
Brecciated quartz/quartzite with iron oxides, chiefly SiO₂ with hematite/goethite and possible feldspar or host-rock fragments
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)
sedimentary
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (River Cobble)
Sandstone (composed predominantly of SiO2 - Quartz)
sedimentary
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary