Quartzite with Quartz Veins
Quartzite (chiefly SiO2)
metamorphic
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Green Quartzite
Quartzite (primarily SiO2 with trace impurities)
metamorphic
Quartzite Cobble
Quartzite (primarily SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (or Ferruginous Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
metamorphic
Green Aventurine
Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Aventurine
Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)
mineral
Green Quartzite (Aventurine-like)
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Chalcedony (Common Opal variant or Chert/Flint)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (Quartz-rich Cobble)
Quartzite (SiO2)
metamorphic
Quartzite pebble
Quartzite (primarily SiO2)
metamorphic
Muscovite on Quartz (Mica host rock)
KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)
igneous/metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Slag
Anthropogenic Iron Silicate Glass
mineral
Pumice
Pumice (volcanic glass foam)
igneous
Obsidian
Volcanic glass (mainly SiO2)
Igneous
Black Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Pumice
Pumice (Vesicular Volcanic Glass)
igneous
Obsidian
Obsidian (Amorphous volcanic glass)
igneous
Black Obsidian
Volcanic Glass (SiO2 + impurities)
Igneous
Apache Tear
Hydrated Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Pumice
Pumice (Vesicular volcanic glass)
igneous
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Pumice
Pumicite (Amorphous volcanic glass)
Igneous
Obsidian (specifically Rainbow or Silver Sheen Obsidian)
Volcanic Glass (predominantly SiO2)
Igneous
Apache Tear
Obsidian (Hydrated Volcanic Glass)
igneous
Mahogany Obsidian
Volcanic Glass (SiO2 + Fe2O3)
igneous
Apache Tear (Obsidian)
Volcanic glass / Amorphous SiO2
igneous
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Apache Tear
Hydrated Obsidian (Volcanic Glass)
Igneous
Goldstone
Avventurina (Cu + SiO2 glass)
mineral