Antropogenic Rock (Man Made)

Mica Schist

Crystalline Schist (often containing Muscovite, Biotite, and Quartz)

Serpentinite

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

Gneiss

Gneiss

Unakite

Unakite (Epidotized Granite)

Serpentine (Nephrite-like Serpentine)

Serpentinite (Hydrous magnesium iron phyllosilicate)

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Mica Schist with Garnet

Garnetiferous Mica Schist

Quartzite

Quartzite (SiO2)

Dalmation Stone (often called Dalmatian Jasper)

Antiperthite-rich Microgranite

Chert (and/or Siltstone River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone

Arenite (composed primarily of SiO2)

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Serpentine

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

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Gold Nugget

Native Gold (Au)

Unakite

Epidotized Granite

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Unakite

Unakite (Altered Granite consisting of Orthoclase KAlSi3O8, Epidote Ca2(Al,Fe)3(SiO4)3(OH), and Quartz SiO2)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Serpentine

Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Unakite

Epidotized Granite (SiO2, KAlSi3O8, Ca2(Al, Fe)3(SiO4)3(OH))

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Serpentinite

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

Yellow Quartzite

Quartzite (primarily SiO2)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Sandstone (River Pebble)

Arenite (primarily SiO2)

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Sandstone

Arenite (SiO2 based)

Grey Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Iron-stained Quartzite

Metamorphic Quartz (SiO2) with limonite/hematite staining

Halite

Halite (Sodium Chloride, NaCl)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Druzy on Geode Fragment

Silicon Dioxide (SiO2)

Quartzite (River Stone)

Quartzite (SiO2)

Flower Jasper

Agatized Fossil Coral / Chalcedony (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)