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

Bumblebee Jasper

Travertine (Calcite/Aragonite) with Realgar, Pyrite, and Volcanic Ash

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Chert (Flint Nodule)

Microcrystalline and Cryptocrystalline Quartz (SiO2)

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Chert / Jasper

Sedimentary Cryptocrystalline Quartz (SiO2)

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Iron-stained Quartzite / Chert

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Weathered chert or siliceous limestone

Microcrystalline quartz (SiO₂), possibly replacing or cementing carbonate rock

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Jasper-Quartz Conglomerate / Chert

Siliceous Sedimentary Rock (SiO2)

Chert (likely jasper/chalcedony-rich chert)

Microcrystalline quartz, SiO₂

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Shale

Lutaceous Rock (Hydrous Aluminum Silicates)

Chert (River Pebble with Liesegang Rings)

Microcrystalline Silicon Dioxide (SiO2)

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Gneiss (specifically Granitic Gneiss)

Gneissic Metamorphic Rock

Chert or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly weathered chert

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Hag Stone

Perforated sedimentary rock (typically flint, chert, or limestone)

Banded Chert

Microcrystalline Quartz (SiO2)

Flint

SiO2 (Microcrystalline Quartz / Chert)

Limestone (specifically Travertine or Tufa)

Calcium Carbonate (CaCO3)

Chert / River Pebble

Microcrystalline Silica (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Chert Concretion / Nodule

Microcrystalline Quartz (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)

Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (specifically Quartz Arenite)

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Chert (specifically Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (specifically Banded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert

Microcrystalline Quartz (SiO2)

Banded gneiss

Gneiss, chiefly quartz–feldspar–mica

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Quartzite variety)

Microcrystalline Silica (SiO2)