Olivine Basalt
Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)
igneous
Category
Basalt
Browse basalt specimens identified by the Rock Identifier community.
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Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Porphyritic Basalt
Porphyritic Mafic Volcanic Rock
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Basalt with Vesicles
Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)
igneous
Porphyritic Basalt
Porphyritic Basalt (Mafic Igneous Rock)
igneous
Chinese Writing Stone
Porphyritic Basalt or Porphyritic Andesite
igneous
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Celadonite in Amygdaloidal Basalt
K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2 (Celadonite mineral) within a Basalt matrix
igneous
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basaltic Andesite
igneous
Scoria
Vesicular Basaltic Rock
igneous
Lava Rock (Scoria)
Extrusive basaltic scoria
igneous
Lava Rock (Scoria)
Scoria (Basaltic Scoria)
igneous
Basalt (Water-worn pebble)
Mafic Igneous Rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Basalt (Water-worn Pavement Stone)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt (Road Aggregate / Crushed Stone)
Aphanitic Mafic Igneous Rock
igneous
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
igneous
Larimar
NaCa2Si3O8(OH)
gemstone
Pyrite and Sunstone
Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)
mineral
Basalt with Quartz Veins
Aphanitic Mafic Igneous Rock (Main body: SiO2, Fe, Mg rich)
igneous
Carnelian
Carnelian (Chalcedony/Quartz, SiO2)
mineral
Chalcedony Geode Part (Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper with Iron Staining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Basalt with Epidote (Flowerstone-like texture)
Amygdaloidal Basalt (silicate mineral inclusions)
igneous
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Lava Rock (Scoria)
Scoria (Mafic volcanic rock)
igneous
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Peridotite (Dunite)
Peridotite (mostly Olivine: (Mg,Fe)2SiO4)
igneous
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Amethyst Quartz (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine (Mg, Fe)2SiO4
mineral
River Stone (Basalt or Siltstone with banding)
Polished Basaltic or Siliciclastic River Cobble
igneous or sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Lava Rock (Basalt)
Basalt (extrusive igneous rock)
igneous
Basalt (River Cobble)
Basalt (Mafic volcanic rock)
igneous
Larimar
Pectolite (a variety of pectolite, NaCa2Si3O8(OH))
Mineral
Andesite
Andesite
igneous
Basalt (River Stone)
Basalt (Mafic Extrusive Igneous Rock)
igneous