Black Obsidian
Obsidian, SiO2 (amorphous)
Igneous rock (Volcanic glass)
Category
Igneous Rock (Volcanic Glass)
Browse igneous rock (volcanic glass) specimens identified by the Rock Identifier community.
Learn about Igneous Rock (Volcanic Glass) in the encyclopedia
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Basalt with Quartz Vein
Extrusive Igneous Rock / Volcanic Rock
igneous
River Stone (Basalt or fine-grained Schist)
Mafic Igneous Rock / Volcanic Basalt
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Black Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Pumice
Pumice (Volcanic glass / Felsic igneous rock)
igneous
Black Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Pumice
Pumice
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Obsidian (volcanic glass)
igneous
Pumice or vesicular volcanic rock
Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass (Silica-rich glass)
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Agate
Silicon dioxide (Chalcedony, SiO2)
sedimentary
Pumice
Volcanic glass / Pumiceous rock
igneous
Black Obsidian
Volcanic Glass (SiO2 with impurities)
igneous
Obsidian
Volcanic Glass
igneous