Quartz Geode
Silicon Dioxide (SiO2) in a Geode body
sedimentary or igneous (host environment)
Category
Mineralological Specimen
Browse mineralological specimen specimens identified by the Rock Identifier community.
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
metamorphic
Arkosic Sandstone (or Conglomeritic Sandstone fragment)
Arkose (rich in feldspar)
sedimentary
Chert (Polished River Pebble)
Chert (SiO2)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite (River Cobble)
Quartzite (predominantly SiO2)
metamorphic
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
sedimentary
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartzite River Stone
Quartzite (primarily SiO2)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt (Water-worn pebble)
Basalt (Mafic Extrusive Rock)
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Banded Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz (Water-Worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz (Beach Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite River Rock
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (mostly SiO2)
metamorphic
White Quartz Pebble (with possible Quartz Geode cavity)
Silicon Dioxide (SiO2)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
sedimentary
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Quartzite Pebble (with Iron Inclusions)
Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)
metamorphic
Crinoid Fossil in Limestone
Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)
sedimentary
Quartz Cobble (with Iron Staining)
Silicon Dioxide (SiO2)
mineral
Jasper Quarzite (possibly Lake Superior Agate mix)
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Quartzite Pebble (with iron staining)
Quartzite (SiO2 with ferric oxide impurities)
metamorphic
Amber
Succinite (fossilized resin)
Organic Mineraloid
Quartzite River Rock (with Limonite staining)
Quartzite (SiO2)
metamorphic
Basalt (River Pebble)
Basalt
igneous
Black River Stone (likely Basalt or Chert)
Basalt (primarily Plagioclase Feldspar and Pyroxene)
igneous
Ammonite Fossil (Polished Half)
Ammonoidea (subclass)
sedimentary
Quartzite (Beach Pebble)
Quartzite (composed primarily of SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Quartzite (River Cobble)
Metamorphic Rock (composed predominantly of SiO2)
metamorphic