Tektite
Natural impact glass
meteorite
Category
Glass
Browse glass specimens identified by the Rock Identifier community.
Learn about Glass in the encyclopedia
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Tektite
Natural Impact Glass
meteorite
Pumice
Volcanic glass / Pumice
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Scoria
Vesicular Basaltic Glass
igneous
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Pumice (specifically a water-worn, weathered variety)
Vesicular volcanic glass
igneous
Obsidian (Apache Tear)
Volcanic Glass (SiO2)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Apache Tears (Obsidian)
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
Igneous
Pumice (likely weathered/water-worn)
Vesicular volcanic glass
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Opalite
Synthetic Opalised Glass
mineraloid (synthetic)
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Silver Sheen Obsidian
Volcanic Glass (SiO2)
igneous
Black Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Pumice
Vesicular volcanic glass
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian (Black Obsidian)
Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Dark brown tumbled stone, likely smoky quartz or polished jasper
Uncertain from image; possible quartz, SiO₂, or iron-rich microcrystalline silica (jasper)
mineral
Blue glassy fragment among beach gravel
Likely cobalt-blue man-made glass; not a natural mineral specimen
mineral
Mixed tumbled stones, likely rose quartz and purple quartz/amethyst
Quartz (SiO₂), including amethyst and probable rose quartz; exact identification is uncertain from the blurred image
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Golden Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-rich rock, likely milky quartz or quartzite
Quartz (SiO₂); possibly quartzite, a recrystallized quartz sandstone
metamorphic