Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Category
Basalt
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Basalt (Vesicular)
Basalt (mostly plagioclase, pyroxene, and olivine)
igneous
Vesicular Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
igneous
Basalt with Quartz Veins
Mafic Igneous Rock with Quartz (SiO2) intrusions
igneous
Olivine in Basalt
Peridotite / Forsterite ((Mg,Fe)2SiO4)
igneous
Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe3+)
mineral
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
mineral
Mixed Crushed Stone
Aggregate (varied mineral composition)
igneous and sedimentary mixture
Porphyry
Porphyritic Basaltic Andesite
igneous
Scoria (with likely iron oxidation)
Scoria (Basaltic Scoria)
igneous
Scoria (Lava Rock)
Scoria (Basaltic Scoria)
Igneous
Scoria
Extrusive Basaltic Scoria
igneous
Limonite Stained Basalt
Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)
igneous
Beach Pebble (likely Basalt or Chert)
Volcanic Basalt / Microcrystalline Quartz
igneous
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Polished Agate Geode
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Blue Lace Agate
Silicon Dioxide (SiO₂), a variety of Chalcedony
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with iron impurities)
mineral
Basalt with Quartz Veins
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Martian Meteorite (Black Beauty)
NWA 7034 (Northwest Africa 7034)
igneous
Basalt with Sulfide/Pyrite inclusion
Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)
igneous
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Peridotite
Peridotite (composed largely of Olivine (Mg,Fe)2SiO4)
igneous
Basalt with Quartz/Feldspar Inclusion
Basalt (containing Silicate minerals such as SiO2 and (Ca,Na)(Al,Si)4O8)
igneous
Basalt Pebble
Basalt (Extrusive Mafic Rock)
igneous
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt with Feldspar Phenocrysts
igneous
Basalt River Stones
Basalt (Mafic volcanic rock)
igneous
Basalt River Pebble
Basalt (Mafic Volcanic Rock)
igneous
Basalt with inclusion
Basalt (Aphanitic-Porphyritic texture)
igneous
Basalt Pebble
Mafic Igneous Rock (Basalt)
igneous
Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
igneous
Basalt Pebble
Basalt (Mafic Volcanic Rock)
igneous
Basalt with Feldspar phenocrysts
Aphanitic to Porphyritic Mafic Volcanic Rock
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Andesite
Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)
igneous
Chalcedony (Carnelian)
Silicon Dioxide (SiO2)
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral