Sedimentary Rock

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Mica Schist with Pyrite

Muscovite/Biotite Schist with Iron Sulfide (FeS2)

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Ferruginous Conglomerate

Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Oxide impurities

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Fossiliferous Limestone (Coquina / Shell Limestone)

CaCO3 (Calcium Carbonate)

Chert / Pink Chert

Silicon Dioxide (SiO2)

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Coal (Anthracite)

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Quartz Pebble (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (Metamorphic Rock)

Gneiss

Dragon Blood Jasper

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

River Rock (Quartz-dominated)

Silicon Dioxide (SiO2) mixture with varied clastic sediments

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) with varying mineral impurities

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

River Cobble (likely Quartzite or Limestone)

SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Precious Opal

Hydrated Silica (SiO2·nH2O)

Red Jasper

Jasper (Silicon Dioxide with iron oxide inclusions), SiO2

Turquoise

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Chert (Green variety)

Microcrystalline Opaline/Quartz (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Banded River Rock / Gneiss (highly weathered)

Gneiss

Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Turquoise

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

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Mica Schist

Mica Schist (predominantly Muscovite/Biotite)