Igneous And Metamorphic Derivative (Weathered)

Sandstone (Weathered)

Arenite (primarily SiO2)

Limestone (Weathered)

Calcium Carbonate (CaCO3)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Quartzite

Quartzite (composed mainly of SiO2)

Pink Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Pink Quartzite

Quartzite (SiO2)

Quartzite with Hematite

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Quartzite (Iron-stained)

Quartzite (mostly SiO2)

Quartzite (Iron-stained)

Quartzite (SiO2)

Sandstone (with differential weathering)

Arenite / Quartz Sandstone (SiO2)

Basalt

Mafic volcanic rock (Basalt)

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Quartz pebble

Silicon Dioxide (SiO2)

Granite

Granite (Felsic Plutonic Rock)

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Quartz (Beach Pebble)

Silicon Dioxide (SiO2)

River Quartzite or Chert Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Basalt

Mafic Igneous Basalt

Granite

Granite (Felsic Plutonic Rock)

Basalt

Extrusive mafic igneous rock

Granite

Phaneritic Granocrystalline Igneous Rock

Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)

Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Granite with Biotite and Quartz

Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, and K(Mg,Fe)3AlSi3O10(OH)2)

Peridotite

Peridotite (Ultramafic Rock)

Ferruginous Quartzite (Red Chert/Jasper-like)

Metamorphosed Quartzite with Hematite inclusions (SiO2 + Fe2O3)

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Basalt

Extrusive mafic igneous rock

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Yellow Quartzite (Beach Pebble)

Quartzite (primarily SiO2)