Apache Tear
Hydrated Obsidians (Volcanic Glass)
igneous
Category
Synthetic Glass
Browse synthetic glass specimens identified by the Rock Identifier community.
Learn about Synthetic Glass in the encyclopedia
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Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Volcanic Glass (mostly SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Tektite (Indochinite)
Tektite (Natural silica glass)
igneous
Obsidian
Volcanic Glass (SiO2 dominant)
igneous
Pumice
Pumice (a vesicular volcanic glass)
igneous
Mahogany Obsidian
Volcanic glass (SiO2 + Fe2O3)
igneous
Pumice
Pumice (Vesicular volcanic glass)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
igneous
Tumbled pale green aventurine (probable)
Quartz, SiO₂, with dispersed fuchsite or other green inclusions
mineral
Tumbled carnelian (reddish chalcedony)
Carnelian, a cryptocrystalline variety of quartz (SiO₂)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
igneous
Basalt
Basalt (Extrusive volcanic rock)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Mineral
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Black Obsidian and Hematite
Volcanic Glass (SiO2) and Hematite (Fe2O3)
igneous and mineral
Pumice
Pumicite (Volcanic glass with vesicular texture)
igneous
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
K-Feldspar / Granite Pegmatite
Potassium Feldspar (Microcline/Orthoclase) with Quartz
igneous
Sandstone
Sedimentary quartz arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary