Man Made Material (Constructed)

Brecciated Chert

Sedimentary Chert (SiO2) with Calc-Silicate mineralization

Conglomerate

Conglomerate (clastic sedimentary rock)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 principal composition)

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)

Limestone

Calcium Carbonate (CaCO3)

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Serpentinite

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

Quartz Vein Outcrop

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)

Blue Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Sandstone (with Iron Oxide)

Arenite with Limonite/Hematite staining

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Quartzite

Quartzite (primarily SiO2)

Sunstone

Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Quartz

Sandstone

Arenite (Siliclastic sedimentary rock)

Red Sandstone (Iron-rich Sandstone)

Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone

Arenite (primarily SiO2)

Quartzite with Hematite

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Banded Gneiss (River Cobble)

Gneiss (a high-grade metamorphic rock)

Zebra Jasper

Tumbled Opaque Chalcedony (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Quartzite Cobble

Quartzite (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Diorite (or salt-and-pepper granite pebble)

Phaneritic Igneous Rock (Intermediate Composition)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)

Ocean Jasper

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite