Igneous Or Sedimentary (Water Worn)

River Cobble (Quartzite)

Meta-orthoquartzite

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone

Arenite (primarily SiO2)

Chert (variously identified as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (in Quartz/Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (specifically Jasper or Brown Chert node)

Microcrystalline Quartz (SiO2)

Chert (Jasper variety) with Iron Oxide staining

Cryptocrystalline Quartz (SiO2) with Goethite/Limonite impurities

Granitic Gneiss

Gneiss (Metamorphic Rock)

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Red Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins

Yellow Jasper (Iron-stained Quartz)

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Yellow Jasper / Chert

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Granite (River-worn Cobble)

Phaneritic Felsic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Granite Pebble (Pink Granite)

Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Wishing Stone (Quartz-veined Siltstone or Graywacke)

Hydrothermal Quartz vein in matrix of SiO2 (Quartz) and Al2O3 (Clay minerals)

Quartzite and Chert

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Basalt Pebble

Basalt (Extrusive Mafic Igneous)

Basalt

Basalt (Aphanitic Mafic Volcanic)

River Pebble (Likely Quartzite or Chert)

Quartzite (primarily SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Rough Dark Green Sapphire

Corundum (Al2O3)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Opal

Hydrated Silica (SiO2·nH2O)

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 based with quartz grains)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone Chert/Quartzite

Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Quartzite

Metamorphosed Sandstone (SiO2)

Quartzite Pebble

Quartzite (principally SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (Mookaite variety likely)

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossiliferous Limestone (with Coralline Inclusions)

Calcium Carbonate (CaCO3)

Quartzite River Pebble

Quartzite (SiO2)

River Cobble (likely Quartzite)

Metamorphosed Sandstone (SiO2)