Synthetic (Not A Rock Or Mineral)

Serpentinite

Serpentinite (Hydrated magnesium iron silicate)

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

N/A (This is a digital image of a bar graph)

Digital Data Visualization (Bar Chart)

Gneiss

Gneiss (Metamorphic Rock)

Quartz on Matrix

Silicon Dioxide (SiO2)

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Drupa or Druzy Quartz on Geode Fragment

Crystalline Silicon Dioxide (SiO2)

Granular Sandstone

Arenite (variable composition, primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Red Sandstone

Sedimentary Clastic Rock (Quartz Arenite / Arkose)

Sandstone

Clastic Sedimentary Rock

Sandstone (River Cobble)

Clastic Sandstone (SiO2 with accessory minerals)

Sandstone

Arenite (primarily SiO2)

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Quartz (Druzy / Crystalline)

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Basalt with Vesicular Amygdule

Extrusive igneous rock (Mafic)

Quartz Cluster

Silicon Dioxide (SiO2)

Gneiss

Gneiss (Metamorphic Rock)

Graywacke

Lithic Sandstone (Graywacke)

Quartz Geode

Silicon Dioxide (SiO2)

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Amygdaloidal Basalt with Agate/Chalcedony Infills

Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)

Basalt with Quartz/Feldspar Inclusions

Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining

Limestone Breccia

Sedimentary Breccia (Calcareous)

Mica Schist

Mica Schist (contains muscovite/biotite, quartz, plagioclase)

Basalt with Epidote (Porphyritic Basalt)

Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions

Greywacke (River Pebble with Quartz Veins)

Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Granite and Igneous Rock Collection

Intrusive igneous rock / Granitoid

Gneiss

Banded Metamorphic Rock (Gneiss)

Limestone with Quartz or Calcite Veining

Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions

Turquoise in Matrix

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Gneiss

Gneiss (Metamorphic Rock)

Vesicular Basalt / Scoria (Stream-rounded Cobble)

Mafic extrusive igneous rock

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Garnet-bearing Schist

Almandine Garnet [Fe3Al2(SiO4)3] in Micaceous Schist

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Sandstone (likely Graywacke or Siltstone variety)

Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)

Turquoise

Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)