Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Synthetic Glass
Browse synthetic glass specimens identified by the Rock Identifier community.
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite or Magnetite inclusions)
igneous
Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Sandstone
Arenite
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Potassium Feldspar and Quartz
KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Stream Pebble)
Arenite (primarily SiO2)
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (with Iron staining)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Water-worn)
Silicon Dioxide (SiO2)
mineral
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Glazed Ceramic Tile
Fused Silicate-Clay composite
Synthetic (Man-made material mimicking natural stone)
Pumice
Vesicular volcanic glass (primarily Alumino-silicates)
igneous
Pumice
Pumicite
igneous
Obsidian
Volcanic glass (SiO2-rich extrusive igneous rock)
igneous
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
mineral
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid / impact glass
Mahogany Obsidian
Volcanic Glass (predominantly SiO2 with Hematite/Magnetite inclusions)
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral