Quartz (Clear/Milky)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Biogenic)
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Quartz Crystal with Inclusions
Silicon Dioxide (SiO2)
mineral
Chert Nodule in Limestone
Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)
sedimentary
Silty Shale or Mudstone
Siltstone/Mudstone (Clastic Sedimentary Rock)
sedimentary
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
sedimentary
Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (Lithic Wacke)
sedimentary
Sandstone (Quartzite-rich River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Coquina Limestone (Fossiliferous Limestone)
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (with manganese staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Bituminous Coal
Bituminous coal (Organic Sedimentary Rock)
sedimentary
Sandstone Concretion
Sandstone (Sedimentary rock, mostly SiO2)
sedimentary
Geode (Unopened)
SiO2 (Quartz-filled Sedimentary Nodule)
sedimentary
Travertine (Tufa)
Chemical Sedimentary Rock / Travertine (CaCO3)
sedimentary
Quartz Vein in Siltstone
SiO2 (Quartz) on clastic sedimentary matrix
sedimentary
Limestone (River Pebble)
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Sandstone (Greywacke/Lithic Sandstone)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Jasper Conglomerate (Puddingstone)
Jasper Conglomerate (Siliceous Sedimentary Rock)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Chert / Flint Conglomerate
Silicified Sedimentary Breccia (primarily SiO2)
sedimentary
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Limestone
Calcite-rich sedimentary rock (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Painted Sandstone Cobble
Clastic Sedimentary Rock (Sandstone base)
sedimentary
Conglomerate
Clastic Sedimentary Conglomerate (SiO2 primarily)
sedimentary
Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Limestone with Chert
Sedimentary Rock (CaCO3 with SiO2 inclusions)
sedimentary
Lignite (Brown Coal)
Humic Lignite (Carbonaceous sedimentary rock)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary