Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Category
Mineral (Synthetic Glass)
Browse mineral (synthetic glass) specimens identified by the Rock Identifier community.
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Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Clear Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (SiO2 principal component)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Sandstone
Sandstone (SiO2-rich detrital sedimentary rock)
sedimentary
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Sandstone
Quartz Arenite
sedimentary
Agate
Chalcedony (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz (Druzy/Crystalline)
Silicon Dioxide (SiO2)
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineral
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble with Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
sedimentary
Quartz (Granular Milky Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Black Sapphire
Corundum (Al2O3 with inclusions of hematite or ilmenite)
mineral
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2 + tracing minerals
mineraloid / impactite
Obsidian
Volcanic glass (Amorphous silicon dioxide)
igneous
Pink Granite
Granite (composed of Potassium Feldspar, Quartz, and Plagioclase)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Quartz (Common Grains)
Silicon Dioxide (SiO2)
mineral