Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz (Milky or Yellow/Citrine Quartz)
Silicon Dioxide (SiO2)
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone
Sedimentary Clastic Rock
Sandstone
Clastic Sedimentary Rock
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
Quartz (Milky / Clear Quartz Fragment)
Silicon Dioxide (SiO2)
Quartz Fragment
Silicon Dioxide (SiO2)
Chert (Yellow Jasper / Flint)
Microcrystalline Quartz (SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert (Flint/Novaculite)
Microcrystalline Quartz (SiO2)
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
Milky Quartz on Matrix
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Pyrite in Slate or Shale
Iron Sulfide (FeS2) in Argillaceous Matrix
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Granite
Felsic intrusive igneous rock
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Quartz (Crystal/Druzy Quartz)
Quartz (SiO₂)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal (Herkimer Diamond style)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz with Schorl (Black Tourmaline)
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
Quartz
Silicon Dioxide (SiO2)
Opal
Hydrated amorphous silica (SiO2·nH2O)
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
Sandstone (with potential fossil fragments)
Sandstone (SiO2 dominated with iron oxides)
Quartz
Silicon Dioxide (SiO2)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
Quartz (Grain)
Silicon Dioxide (SiO2)