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

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Chert (and Jasper blend)

Chert (Microcrystalline Quartz, SiO2)

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Sandstone (Stream Pebble)

Arenite (primarily SiO2)

Chert / Flint

Chert (Cryptocrystalline Silica, SiO2)

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Black Chert / Flint)

Silicon Dioxide (SiO2)

Chert (specifically Red Chert / Flint)

Silicon Dioxide (SiO2)

Chert (Jasper and Chalcedony)

Silicon Dioxide (SiO2)

Chert Concretion / Nodule

Microcrystalline Quartz (SiO2)

Caribbean Calcite

Calcium Carbonate with Argonite (CaCO3)

Chert

Microcrystalline Quartz (SiO2)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Chert (often called Jasper or River Rock)

Chert (SiO2)

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Silicon Dioxide (SiO2)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

River Stone (likely Basalt or Chert)

Silicon Dioxide (SiO2) for chert or Mafic Extrusive Rock for basalt

Chert / Chalcedony Nodules

Silicon Dioxide (SiO2)

Banded Chert

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite (formerly believed to be Jasper)

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Puddingstone

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

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Marble

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Quartzite variety)

Microcrystalline Silica (SiO2)

Chert (Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Ventifact

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

Quartz (Microcrystalline/Gravel)

Silicon Dioxide (SiO2)

Chert (varietal: Flint Pitted Pebble)

Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Green Chert

Microcrystalline Quartz (SiO2)