Anthropogenic Material (Man Made Rock)

Diorite

Diorite (Intermediate intrusive igneous rock)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz - SiO2)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Veined Quartz

SiO2 (Silicon Dioxide)

Unakite

Unakite (Epidote-Feldspar rock)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Yellow Quartzite (Tumbled)

Quartzite (SiO2)

Quartzite

Quartzite (Primary mineral: SiO2)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Yellow Quartzite (Iron-Stained Quartzite)

Quartzite (SiO2 with Fe2O3 trace impurities)

Chert (Brecciated or Veined)

Silicon Dioxide (SiO2)

Pink Quartzite

Quartzite (primarily SiO2)

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Quartzite

Quartzite (primarily SiO2)

Fossiliferous Shale Matrix

Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Red Sandstone

Arenite (primarily composed of SiO2 with Fe2O3 cement)

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Chert (White Chert/Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Serpentinite

Serpentinite (complex of lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Petrified Wood

Silicified Wood (SiO2)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Tufa

Calcareous Tufa (CaCO3)

Quartz Geode

Silicon Dioxide (SiO2)

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

Basalt

Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Granite

Granite (Felsic intrusive igneous rock)

Chert / Jasper

Cryptocrystalline Silica (SiO2)

Chert (includes Flint & Jasper)

Chert (Siliceous sedimentary rock, chemical formula SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Coquina / Shelly Limestone

Bioclastic Limestone (composed of CaCO3)

Chert (specifically Flint or Dark Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper and Yellow Chert (Tumbled)

Microcrystalline Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2