Basalt

Basalt with Quartz/Calcite Inclusions

Mafic Volcanic Rock (Fe-Mg silicate rich)

Basalt Pebble

Aphanitic mafic volcanic rock

Basalt (Weathered/Tumbled)

Extrusive Mafic Igneous Rock

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Labradorite

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

Celadonite in Basalt (Green Earth)

Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)

Basalt Pebble with Quartz Veining

Basalt (extrusive volcanic rock)

Basalt River Stone

Basalt (Mafic volcanic rock)

Vesicular Basalt

Extrusive Basalt (Mafic Silicate)

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt Pebble

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)Si2O6 and (Ca, Na)AlSi3O8

Basalt (Crushed Stone Aggregate)

Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)

Granodiorite

Phaneritic Granodiorite

Basalt (Weathered River Stone)

Basalt (Extrusive Mafic Igneous Rock)

Basalt with Weathering Crust

Extrusive mafic volcanic rock

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Basalt (Weathered Pebble)

Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene

Basalt (Vesicular)

Extrusive mafic igneous rock

Basalt (River Rock pebble)

Basalt (a mafic extrusive igneous rock)

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Igneous Rock)

Basalt River Stone

Basalt (Aphanitic Mafic Volcanic Rock)

Basalt with Iron Oxides

Mafic Igneous Rock (Mafite)

Basalt with Vesicles

Aphanitic Mafic Volcanic Rock (Basalt)

Basalt with Quartz Veining

Amygdaloidal Basalt (predominately SiO2 and (Na,Ca)(Si,Al)4O8)

Basalt with Iron Oxidation

Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)

Basalt Water-Worn Pebble

Aphanitic Mafic Igneous Rock

Basalt River Pebble

Basalt (Aphanitic Mafic Igneous Rock)

Basalt (Greenstone/Trap Rock)

Basalt (dominated by plagioclase feldspar and pyroxene)

Vesicular Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)

Basalt Pebble

Extrusive Mafic Volcanic Rock

Basalt (River Stone)

Extrusive Mafic Igneous Rock (Basalt)

Basalt with vesicles/amygdules

Basalt (containing volcanic glass and plagioclase)

Basalt (Polished River Stone)

Aphanitic Mafic Igneous Rock

Basalt (with possible Olivine inclusions)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Amethyst Geode Cathedral

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Basalt (Polished River Stone)

Basalt (Extrusive Mafic Volcanic Rock)

Basalt (Crushed Stone)

Basalt (Mafic Extrusive Igneous Rock)

Grey Agate

Silicon Dioxide (SiO2) - variety: Agate/Chalcedony

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2 with Fe impurities)