Anthropogenic (Man Made Material Processed By Nature)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone

Arenite (primarily composed of SiO2)

Quartz River Pebble

Quartz (Silicon Dioxide, SiO2)

Ferruginous Quartz

Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Breccia

Breccia - Clastic sedimentary rock

Mica Schist

Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz Vein Outcrop

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (Fe2O3 staining)

Quartzite (River Cobble)

Metamorphic Quartz-rich Rock

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Chrysoprase

Chalcedony (cryptocrystalline SiO2 variety)

Jasper with Cinnabar (Dragon Blood Jasper variant)

Silicon Dioxide with Mercury Sulfide (SiO2 + HgS)

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

Sandstone

Arenite (primarily composed of SiO2 - Silicon Dioxide)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Orange Calcite

Calcium Carbonate (CaCO3)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Milky or Iron-Stained Quartz

Quartz (Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (SiO2)

Chert (specifically Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Veined Quartz

SiO2 (Silicon Dioxide)

Chert (variant of Flint)

Chert (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Quartz

Silicon Dioxide (SiO2)

Gold

Aurum (Elemental Gold, Au)

Fossilized Shark Tooth

Scapanorhynchus (Sand Tiger Shark relative)

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Anthracite Coal

Anthracite (high-rank coal)

River Stone (River Pebbles)

Alluvial Deposit (typically Quartzite, Sandstone, or Granite clasts)

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood

Silicified Wood (SiO2)