Basalt with Jasper Veining
Basaltic Rock with Cryptocrystalline Quartz (SiO2)
igneous
Category
Basalt
Browse basalt specimens identified by the Rock Identifier community.
Learn about Basalt in the encyclopedia
View all →
Carnelian
Carnelian (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Granodiorite
Granodiorite (intermediate plutonic rock)
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Basalt Pebble
Extrusive mafic igneous rock
igneous
Basalt with Quartz Veins
Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)
igneous
Diabase
Diabase (also known as Dolerite)
igneous
Granodiorite Pebble
Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite/Amphibole)
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Basalt Pebble
Extrusive mafic igneous rock
igneous
Gabbro
Gabbro (Mg, Fe)2Si2O6 / (Ca, Na)(Al, Si)4O8
igneous
Basalt (Water-worn Pebble)
Mafic Volcanic Rock (High in Fe and Mg)
igneous
Basalt River Stone
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Basalt with Scoria
Mafic Volcanic Rock (Basalt/Scoria)
igneous
Andesite River Stones
Andesite
igneous
Weathered Basalt with Iron Staining
Mafic Igneous Rock
igneous
Black River Stone (likely Basalt or Chert)
Basalt (primarily Plagioclase Feldspar and Pyroxene)
igneous
Andesite
Intermediate Volcanic Rock (Andesite)
igneous
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Granodiorite (Riverbed Cobble)
Granodiorite
igneous
Basalt River Pebble
Extrusive mafic igneous rock; primarily composed of Plagioclase Feldspar and Pyroxene
Igneous
Porphyritic Andesite
Porphyritic intermediate volcanic rock (Andesite)
Igneous
Basalt with Quartz Vein
Mafic Volcanic Rock with SiO2 intrusion
igneous
Basalt with Vesicle/Vug
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Wishing Stone (Basalt with Quartz Vein)
Basalt containing a microcrystalline quartz (SiO2) or calcite vein
igneous
Sunstone
(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)
mineral
Chalcedony (Quartz Pebble)
Cryptocrystalline Quartz (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
Igneous
Peridot in Basalt
Olivine ((Mg, Fe)2SiO4) in Basalt
mineral
Basalt with Quartz Veining
Basalt (SiO2-rich veins)
igneous
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Sunstone (Feldspar)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Sapphire
Corundum (Al2O3)
gemstone
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Prehnite
Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2
mineral
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
metamorphic
Labradorite
Labradorite (Plagioclase Feldspar series; (Ca,Na)(Al,Si)4O8)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
mineral