Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Man Made Byproduct (Non Geological)
Browse man made byproduct (non geological) specimens identified by the Rock Identifier community.
Massive Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Chert (SiO2)
sedimentary
Flint
Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (specifically Gray Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rough Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Massive Quartz or Quartzite)
Silicon Dioxide (SiO2)
mineral / metamorphic
Milky Quartz / Rose Quartz fragment
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
River Pebbles (Sandstone and Quartzite)
SiO2 (Quartz) dominated clastic rocks
sedimentary and metamorphic
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Milky Quartz with Iron Staining and Matrix
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint in this variation)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Chert (specifically Jasper or Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO₂)
sedimentary
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Moss Agate
Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite
mineral
Moss Agate
Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)
mineral
Scoria (Lava Rock)
Scoria
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral