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

Gneiss (specifically Banded Gneiss)

Gneiss

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Caliche (with Lichen Cover)

Calcium carbonate-cemented soil layer (CaCO3)

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Chert (specifically Jasper or Flint)

Cryptocrystalline Quartz (SiO2)

Chert (Field Stone)

Chert (SiO2)

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Gneiss (specifically Amphibolite Gneiss)

Gneiss

Druzy Quartz (on Geode Fragment)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Banded Agate (specifically Botryoidal/Orbicular Agate)

Silicon Dioxide (SiO2)

Shiva Lingam

Cryptocrystalline Quartz (Jasperiod Silicate with Iron Oxide inclusions)

Limestone

Calcium carbonate ( преимущественно CaCO3)

Quartz

Quartz (SiO₂)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Septarian Nodule (Dragon Stone)

Septarian Geode (CaCO3 + Mg + Fe)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Agate Slices and Clear Quartz Points

Agate (SiO2 Chalcedony) and Clear Quartz (SiO2 Crystalline)

Native Copper within Host Rock

Native Copper (Cu)

Fluorite

Calcium Fluoride (CaF2)

Chert (Quartz Variety)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert (specifically Jasper/Flint)

Chert (SiO2)

Chert (specifically a flint nodule component)

Microcrystalline quartz (SiO2)

Banded Jasper (possibly "Picture Jasper")

Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)

Banded Onyx (Calcite Marble)

Calcite (CaCO3) - Trap-rock or Cave Onyx

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Thunderegg (Ate Agate/Jasper Geode)

Silicon Dioxide (SiO2) within Rhyolite/Perlite matrix

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Pyrite

Pyrite (FeS2)

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Tufa

Calcareous Tufa (CaCO3)