Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
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Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Weathered gray rock fragment
Likely quartz-rich sandstone or weakly metamorphosed sandstone; exact identification is uncertain from the photograph
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
mineraloid
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Aventurine Glass
Man-made glass (often grouped with minerals in lapidary)
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Synthetic (Man-made Glass)
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartz with Matrix
Silicon Dioxide (SiO2)
mineral