Black Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
Learn about Amorphous Solid in the encyclopedia
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Pumice
Vesicular Rhyolite (Amorphous glass)
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Apache Tear (Obsidian)
Obsidian (Si02 - Amorphous Silicate)
igneous
Obsidian (in jewelry setting)
Volcanic Glass (Amorphous Silica)
igneous
Black Obsidian
Amorphous volcanic glass (SiO2)
igneous
Obsidian
Amorphous volcanic glass (SiO2)
igneous
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Black Obsidian
Volcanic glass (Amorphous silicates)
igneous
Amber
Fossilized tree resin (Amorphous)
gemstone
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Apache Tear (Obsidian)
Volcanic Glass (Amorphous SiO2)
igneous
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
Igneous
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
igneous
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Tektite (Indochinite)
Tektite (Amorphous Meteoritic Glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Slag Glass
Amorphous Silica / Glass Slag
industrial byproduct (anthropogenic rock-like material)
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
igneous
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous