Sandstone
Arenite (SiO2 primarily)
sedimentary
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
Learn about Manufactured Glass in the encyclopedia
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Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
igneous
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Likely vesicular basalt (scoria)
Basaltic scoria; chiefly plagioclase, pyroxene, and olivine with volcanic glass
igneous
Possible ironstone concretion
Iron-oxide-rich concretion, likely hematite/goethite; exact identification is uncertain from the photo
sedimentary
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Quartz Sandstone
Quartz Arenite
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Carbonate Beach Sand
Biogenic Carbonate Sediment (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone Cobble
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Massive Quartz
Silicon dioxide (SiO2)
mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Blue chalcedony (likely dyed or assembled cabochon)
Microcrystalline quartz, SiO₂ (chalcedony)
gemstone
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived