Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Mineralological Specimen
Browse mineralological specimen specimens identified by the Rock Identifier community.
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Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Druzzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Otodus sp. (possibly Otodus obliquus)
fossil
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Mica (Muscovite or Biotite)
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Smoky Quartz (with Iron Oxidation)
Silicon Dioxide (SiO2)
mineral
Gold (Elemental Metal)
Gold (Au)
Mineral
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky)
Silicon Dioxide (SiO2)
mineral
Granite Cobble
Granite (Phaneritic Quartz-Feldspar specimen)
igneous
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Tumbled Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Cobble
Quartzite (primarily SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) in a sedimentary host
sedimentary
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Ferruginous Oxides
mineral
Gabbro Pebble (Polished Beach/River Stone)
Gabbro
igneous
Amygdaloidal Basalt with Quartz Veining
Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining
igneous
Quartzite Pebble
Quartzite (SiO2 with minor iron impurities)
metamorphic
Chert River Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Milky and Smoky variety)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Chalcedony (likely carnelian or flint variety)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
mineral
Ruby in Fuchsite (often confused with Ruby in Zoisite)
Corundum (Al2O3) in Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)
metamorphic
Iron-stained Milky Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
River Rock (Granite Cobble)
Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)
igneous
Pyrite in Matrix (Quartz/Schist)
Iron Sulfide (FeS2)
mineral
River Pebble (Gneiss or Quartzite variant)
Metamorphic rock specimen (likely Quartzite or Gneiss)
metamorphic
Amethyst
Silicon Dioxide (SiO2) with trace Iron impurities
mineral