Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Gold Nugget
Native Gold (Au)
Greywacke (likely)
Greywacke (a type of sandstone)
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
Quartz Pebble
Silicon Dioxide (SiO2)
Tree Agate
Silicon Dioxide (SiO2) - Dendritic Agate/Chalcedony
Ferruginous Chert
Microcrystalline Quartz (SiO2) with Iron Oxides
Pyrite (on Quartz matrix)
Iron Disulfide (FeS2)
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
Petrified Wood
Silicified Wood (primarily SiO2)
Quartz / River Cobble
Silicon Dioxide (SiO2)
Clear Quartz (Carved Merkaba)
Silicon Dioxide (SiO2)
Jasper, Agate, Quartz Mix (Polished Beads)
SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.
Green Aventurine in Host Rock
SiO2 (Quartz with Fuchsite inclusions)
Jasper (Imperial Jasper style)
Silicon Dioxide (SiO2) with impurities
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Chert (Arrowhead or Projectile Point)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (varietal Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert Nodule
Chert (Cryptocrystalline variety of Quartz, SiO2)
Red Sandstone
Arenite (with Iron Oxide)
Amethyst
Silicon dioxide (SiO2) with iron impurities
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Clear Quartz
Silicon Dioxide (SiO2)
Kambaba Jasper
Stromatolite (Fossilized Algae)
Gold
Native Gold (Au)
Limonitic Sandstone (Stained Sandstone)
Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining
Red Sandstone
Sandstone (mainly SiO2 with Iron Oxide cement)
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
Quartzite
Quartzite (primarily SiO2)
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
Shale
Shale (comprised mostly of clay minerals and quartz)