Sedimentary Rock (Specifically A Clastic Sedimentary Rock Formed Into A Cobble)

Orange Calcite (Carved as a Horned Skull)

Calcium Carbonate (CaCO3)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Yellow Calcite

Calcium Carbonate (CaCO3)

Chalcedony in Host Rock

Chalcedony (SiO2)

Tufa

Calcareous Tufa (CaCO3)

Limestone

CaCO3 (principally Calcite)

Gneiss

High-grade regional metamorphic rock (Foliated)

Marble (Carrara style)

Recrystallized Calcite-rich Metamorphic Rock (CaCO3)

Halite

Halite (Sodium Chloride, NaCl)

Jasper

Jasper (Silica/Quartz) - SiO2

Orange Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Porphyritic Rhyolite (Red Porp)

Porphyritic Rhyolite (Felsic volcanic rock)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Chert / Flint Nodule

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Druzy Quartz on Agate/Chert

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Orthoceras Fossil in Limestone

Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other impurities

Banded Chert (River Siltstone)

Microcrystalline Quartz (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Pink Granite

Phaneritic Plutonic Igneous Rock (composed of K-feldspar, Quartz, and Mica)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) - Opaque Chalcedony

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Fossilized Coral

Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)

Sandstone (with Limonite staining)

Arenite (FeOx-rich)

Chert (Quartzite-rich River Pebble)

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Biggs Jasper (Picture Jasper)

Silicon Dioxide (SiO2) - Opaque Silicified Volcanic Ash

Sandstone

Arenite (primarily SiO2)

Red Jasper (Heliotrope family variant)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)