Metamorphic (Altered Igneous Rock)

Basalt River Cobble

Basalt (Mafic Igneous Rock)

Basalt (River Stone)

Basalt (Extrusive Igneous Rock)

Basalt

Aphanitic Mafic Igneous Rock

Basalt River Stone

Extrusive mafic igneous rock

Basalt

Extrusive mafic igneous rock

Basalt

Extrusive mafic igneous rock

Vesicular Basalt

Extrusive mafic igneous rock

Basalt

Africite (Mafic Igneous Rock)

Basalt River Cobble

Basalt (Mafic Igneous Rock)

Basalt

Extrusive mafic igneous rock

Basalt

Extrusive mafic igneous rock

Basalt (River Pebble)

Extrusive mafic igneous rock

Basalt

Basalt (Mafic igneous rock)

Granite Cobble

Granite (Phaneritic Igneous Rock)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Smoky Quartz

SiO2 (Silicon Dioxide)

Basalt with minor mineral crusting

Sideromelane / Extrusive Igneous Rock

Basalt

Extrusive mafic igneous rock

Basalt

Extrusive mafic igneous rock

Gabbro

Plutonic mafic rock

Druzy Quartz

Silicon Dioxide (SiO2)

Quartzite (clastic/metamorphic subtype)

Quartzite (primarily Silicon Dioxide, SiO2)

Unakite

Unakite (Epidotized Granite)

River Pebbles (Mixed Lithology)

Conglomerate clasts (Silica-rich and Metamorphic assemblages)

Dragon Blood Jasper

SiO2

Serpentinite

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

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Quartzite (River Cobble)

Metamorphic Rock (composed predominantly of SiO2)

Anthracite Coal

Anthracite (Carbon-based metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (high-grade metamorphic rock)

Quartzite

Metamorphic Quartzite (primarily SiO2)

Unakite

Unakite (Metamorphosed granite)

Unakite (or Epidote-rich Granite)

Unakite (composed of Epidote {Ca2(Al, Fe)3(SiO4)3(OH)}, Pink Orthoclase Feldspar {KAlSi3O8}, and Quartz {SiO2})

Vesicular Basalt

Basalt with vesicular texture

Granite Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Soapstone / Steatite

Steatite (primarily Talc, Mg3Si4O10(OH)2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)