Sedimentary Rock (Specifically A Chemical Sedimentary Rock, Or A Chert If Considered Purely Mineral Aggregate)

Yellow Jasper (Chert)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon dioxide (SiO2)

Chert Nodule (Commonly known as Flint or River Rock)

Silicon Dioxide (SiO2)

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)

Chert (Grey/Black variety)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (Polished Gemstone / River Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Chert (River Cobble)

Microcrystalline Quartz (SiO2)

Banded Chert (Agate/Jasper blend)

Microcrystalline Quartz (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (specifically Jasper/Flint)

Chert (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Chert (or Flint)

Chert (Sedimentary Cryptocrystalline Sio2)

Limestone (specifically Marl or Chalk)

Calcium Carbonate (CaCO3)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Jasper or Flint type)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Chert (and Flint variant)

Microcrystalline Quartz (SiO2)

Dendritic Agate (or Dendritic Opal)

SiO2 (for Agate), SiO2·nH2O (for Opal)

Jasper (specifically a banded or dark variety)

Silicon Dioxide (SiO2) with impurities

Chert (Arrowhead Fragment)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Gneiss (specifically Banded Gneiss)

Gneiss

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Chert

Chert (microcrystalline quartz)

Chert (Yellow/Tan)

Microcrystalline Quartz (SiO2)

Sandstone (with Possible Iron Staining/Crust)

Arenite (SiO2 based)

Marble

Recrystallized Carbonate Rock (CaCO3)

Sandstone with Liesegang Rings

Arenite with Iron Oxide Concretions

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Chert Nodule

Microcrystalline Silica (SiO2)

Chert (Red Jasper)

Microcrystalline Quartz (SiO2)

Banded Chert

Microcrystalline silicon dioxide (SiO2)

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

Chalcedony (Agate/Jasper mix in host rock)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Chert (Jasper/Mudstone)

Silicon Dioxide (SiO2)