Libyan Desert Glass
Impactite silica glass (SiO2)
tektite (impact glass)
Category
Mineraloid (Man Made Glass)
Browse mineraloid (man made glass) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Man Made Glass) in the encyclopedia
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Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic glass (SiO2-rich)
igneous
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Clear Quartz (Rock Crystal) Bracelet
Silicon Dioxide (SiO2)
gemstone
Weathered vuggy quartz-rich rock (probable silicified limestone or quartz breccia)
Microcrystalline quartz (SiO₂) with calcite (CaCO₃), iron oxides, and minor clay minerals
sedimentary
Dragon Vein Agate (Dyed/Fractured Quartz)
Silicon dioxide (SiO2)
gemstone
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled brown pebble
Indeterminate; likely quartz-rich sandstone or chert
sedimentary
Sodalite
Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2
Mineral
River Quartz / Quartzite Pebbles
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Raw milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
River Quartzite Spheroid
Recrystallized Orthoquartzite (SiO2)
metamorphic
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Carbonate Beach Sand
Biogenic Carbonate Sediment (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Sandstone
Quartz Arenite
sedimentary
Quartzite with Calcite Tufa
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone Cobble
Arenite (primarily SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary