Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)

Orange Quartzite (River Pebble)

Quartzite (primarily SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Wishing Stone (Graywacke with Quartz Vein)

Graywacke (immature sandstone) with a SiO2 (Quartz) intrusion

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

Jasper

Silicon Dioxide (SiO2)

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Banded Chert (with Quartz Vein)

Microcrystalline Silica (SiO2)

Quartz (Milky or Grainy Variety)

Silicon Dioxide (SiO2)

Basalt with Quartz/Calcite Veins

Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)

Quartz (Milky/Bull Quartz)

Silicon Dioxide (SiO2)

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2)

Chert (and Chert Geode)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide) - SiO2

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite and Calcite inclusions

Limestone

Calcium Carbonate (CaCO3)

Sandstone (specifically Banded Sandstone)

Clastic sedimentary rock (primarily SiO2)

Obsidian

Obsidian (Volcanic Glass; SiO2 content > 70%)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Chert

Chert (microcrystalline quartz)

Chert (Tan/Brown variety)

Chert (Microcrystalline Quartz, SiO2)

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Yellow/Tan variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (White-Grey variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Jasper

Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Quartz Variety)

Chert (mostly SiO2 / Silicon Dioxide)

Yellow Jasper

Tectosilicates (SiO2) with Goethite/Iron oxide inclusions

Chert (Flint variety)

Chert (SiO2)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Arkosic Sandstone

Arkose (Clastic Sedimentary Rock)

Quartz / Vein Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Geode / Druzy Quartz

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Chert or Agate

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Vein in Host Rock (Breccia/Rhyolite)

Silicon Dioxide (SiO2) with matrix