Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Category
Synthetic (Man Made Glass)
Browse synthetic (man made glass) specimens identified by the Rock Identifier community.
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2 prominent)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Snowflake Obsidian
Volcanic glass containing Spherulitic Cristobalite (SiO2)
igneous
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Pumice
Pumice (a highly vesicular extrusive igneous rock)
Igneous
Polished Basalt
Basalt (Mafic volcanic rock)
Igneous
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Red Quartzite (Strawberry Quartz)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint) Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Pebble Map
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions (Quartzite)
metamorphic
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining and Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Opal/Chert variety)
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
Igneous
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein Rock
Quartz (Silicon Dioxide, SiO2)
igneous
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral