Anthropogenic (Man Made Material Mimicking Sedimentary Rock)

Ferruginous Conglomerate

Ferruginous Conglomerate (Clastic Sedimentary Rock)

Chert (with Quartz veins)

Microcrystalline Quartz (SiO2)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Conglomerate (Red Sandstone variety)

Clastic Sedimentary Rock (Conglomeratic Sandstone)

Fossil Coral

Scleractinia (Anthos), primarily Calcium Carbonate (CaCO3)

Chert (variations include Flint or Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (and Flint)

Cryptocrystalline Quartz (SiO2)

Shale or Siltstone

Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)

Banded Sandstone

Arenite (composed primarily of Quartz: SiO2)

Red Sandstone

Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)

Green Jasper (with Quartz veining)

Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

Rough Agate/Chert Nodules

Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Iron-stained Quartzite)

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz - SiO2)

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Bivalve Fossil (Clam/Mollusk)

Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)

Ventifact

Eolian Ventifact (often composed of basalt, chert, or quartzite)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Sandstone

Arenite with Hematite cementation

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Milky Quartz in Conglomerate Matrix

Silicon Dioxide (SiO2) within Clastic Sedimentary Rock

Coquina

Bioclastic Limestone

Polygenetic Breccia

Clastic Breccia (containing lithic fragments in a fine-grained matrix)

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Jasper

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Brachiopod Fossil in Shale

Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)

Jasper Conglomerate (Puddingstone)

Jasper Conglomerate (Siliceous Sedimentary Rock)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Chert Nodule (Commonly known as Flint or River Rock)

Silicon Dioxide (SiO2)

Fossiliferous Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)