Sandstone
Arenite (primarily SiO2)
Category
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Sandstone
Arenite (primarily SiO2)
Sandstone (Weathered)
Arenite (primarily SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Sedimentary Rock (Quartz Arenite)
Aquamarine
Beryllium Aluminum Silicate (Be3Al2Si6O18)
Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble (River Agate / Chalcedony)
Silicon Dioxide (SiO2)
Polished blue banded agate cabochon/ornamental slab
Microcrystalline quartz (chalcedony), SiO₂, with blue coloring or inclusions
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Citrine
Citrine (Silicon Dioxide - SiO2)
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Granite
Granite (a plutonic rock)
Smoky Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Quartzite pebble
Quartzite (SiO2)
Chert (Flint)
SiO2 (Microcrystalline Quartz)
Sandstone (Quartz-rich)
Arenite (SiO2)
Sandstone (Quartz Arenite)
Sandstone (SiO2 with possible mineral cements)
Yellow Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
Pearl
Aragonite (CaCO3) with Conchiolin
Sandstone (Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Sandstone
Arenite (principally SiO2)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Banded Sedimentary Rock
Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands
Diamond
Carbon (C)
Coquina
Coquina (Bioclastic Limestone)
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation
River Quartz (Milky and Smoky mix)
Silicon Dioxide (SiO2)
Polished black agate slice
Chalcedony (microcrystalline quartz), SiO₂, with iron/manganese staining
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
Sandstone (Quartzite-rich Pebble)
Arenite (primarily SiO2)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 dominated)