Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is microcrystalline quartz) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz (Carved or Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide with Iron Oxide impurities)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Ironstone Concretion (likely)
Goethite/Hematite/Limonite cemented sediment
Sedimentary Rock
Quartzite River Pebble
Quartzite (primarily SiO2)
metamorphic
Smoky Quartz (Ferruginous Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Igneous
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartzite (River Pebble)
Metamorphosed sandstone (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone Beach Pebble
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Nodule)
Chert (primarily Microcrystalline Quartz - SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silica (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Tiger's Eye (Brown/Gold variety)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
metamorphic
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Quartzite pebble
Quartzite (SiO2)
metamorphic
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Black Onyx
Silicon Dioxide (SiO2)
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Quartz (specifically Citrine or Yellow Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble with Iron Staining
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)
sedimentary
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
igneous/metamorphic (hydrothermal)