Limonite-stained Chert
Microcrystalline Quartz (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
Category
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
Limonite-stained Chert
Microcrystalline Quartz (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
Quartzite
Metamorphic rock (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Quartz (White Pebble) and Sandstone (Brown/Tan Fragments)
Silicon Dioxide (SiO2) for the white pebble
Agate (specifically Botswana or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (mostly SiO2)
Quartzite
Quartzite (High-purity SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (composed primarily of SiO2)
Quartzite River Rock
Quartzite (primarily SiO2)
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartzite
Quartzite (primarily SiO2)
Red Quartzite / Jasper-rich Pebble
Quartzite (primarily SiO2 with hematite inclusions)
Quartzite with Quartz Veining
Metamorphic Quartz Rock (SiO2)
Quartz-filled Basalt Geode
Amygdaloidal Basalt with Quartz (SiO2)
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Agate
Chalcedony (Microcrystalline Quartz) - SiO2
Milky Quartz
Silicon Dioxide (SiO2)
Black Onyx
Cryptocrystalline Quartz (SiO2) with carbon/iron impurities
Ferruginous Quartz
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Yellow Quartzite (River Pebble)
Quartzite (mainly SiO2)
Quartzite Pebble
Quartzite (SiO2)
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Quartzite Pebble
Quartzite (mostly SiO2)
Quartzite
Quartzite (primarily SiO2)
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Banded Iron Formation (BIF) / Iron Ore
Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Red Chalcedony (likely dyed)
Chalcedony (a variety of Quartz), SiO2
Quartzite with Chlorite Bands
Meta-quartzite with Chlorite (Mg,Fe,Li)6AlSi3O10(OH)8
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with Crocidolite or Magnesio-riebeckite inclusions