Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Dragon Blood Jasper

Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Red Jasper

Silicon Dioxide (SiO₂)

Red Jasper

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Gneiss (with Quartz and Mica)

Gneiss

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Tumbled/Polished Pebble)

Silicon Dioxide (SiO2)

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Rough Quartz (Alluvial Pebbles)

Silicon Dioxide (SiO2)

Concretion

Septarian Concretion (Clay-Ironstone Nodules)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Native Gold Nugget

Native Gold (Au)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Marble

Recrystallized Calcite (CaCO3)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Chert (Green variety)

Microcrystalline Opaline/Quartz (SiO2)

Chert (Nodule)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (also known as Flint or Common Chalcedony)

Cryptocrystalline Silica (SiO2)

Chert (with Chalky Cortex)

Silicon Dioxide (SiO2)

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Jasper and Quartzite mix

Silicon Dioxide (SiO2) with impurities

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Feldspathic Gneiss (Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Jasper with Cinnabar (Dragon Blood Jasper variant)

Silicon Dioxide with Mercury Sulfide (SiO2 + HgS)

Milky Quartz

Quartz (SiO₂)

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (specifically Arkose or Quartz Arenite)

Arenite (primarily SiO2 with possible Feldspar)

Red Sandstone

Arenite (Ferruginous Sandstone)

Petrified Wood

Silicified wood (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Chert (Quartz Variety)

Silicon Dioxide (SiO2)

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O