Obsidian
Volcanic Glass (SiO2)
igneous
Category
Mineral Simulant (Synthetic Glass)
Browse mineral simulant (synthetic glass) specimens identified by the Rock Identifier community.
Learn about Mineral Simulant (Synthetic Glass) in the encyclopedia
View all →
Obsidian
Obsidian (Volcanic Glass)
Igneous
Mahogany Obsidian
Obsidian with Hematite inclusions (SiO2 + Fe2O3)
igneous
Quartz with Chalcopyrite (or Pyrite)
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Quartz (Orange/Pink variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Chatoyant or Milky variety)
Silicon Dioxide (SiO2)
mineral
Fulgurite
Fulgurite (Lechatelierite/Silica glass)
mineral
Milky Quartz in Shale
Silicon Dioxide (SiO2) in sedimentary host rock
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Agate Nodule / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tumbled rose quartz
Rose quartz (pink quartz), silicon dioxide, SiO₂
mineral
Quartz (Milky or Cloudy Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Tourmaline and Iron Staining
Silicon Dioxide (SiO2) with accessory tourmaline and limonite
mineral
Quartz (Iron-Stained / Ferruginous Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Black Obsidian
Volcanic Glass (SiO2)
igneous
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary