White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Manufactured Glass (Simulant)
Browse manufactured glass (simulant) specimens identified by the Rock Identifier community.
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Chert (variations include Flint/Novaculite)
Chert (formula: SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Scoria
Vesicular Basaltic Glass
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Igneous
Sandstone (Greywacke/Lithic Sandstone)
Arenite / Lithic Sandstone
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Quartz River Cobble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
mineral
Plagioclase Feldspar
NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Pink Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Quartzite
Quartzite (SiO2 principal component)
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone with Bedding Planes
Arenite (Sedimentary rock composed primarily of sand-sized minerals)
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic