Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
Chalcedony in Matrix
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sandstone (Quartz-rich Pebble)
Arenite (primarily SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
Jasper (brecciated or orbicular variety)
Silicon dioxide (SiO2) with iron oxide inclusions
Chalcedony (variations like Agate or Jasper)
Chalcedony (SiO₂ - microcrystalline quartz)
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Chert (Iron-Stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite (on Quartz matrix)
Iron Disulfide (FeS2)
Chert (Hagstone/Adder Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Gneiss
Gneiss
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Pyrite
Pyrite (FeS2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
Quartz (milky quartz variety)
Quartz (SiO₂)
Gold Nugget
Native Gold (Au)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 based with mineral cement)
Clear Quartz (Carved Merkaba)
Silicon Dioxide (SiO2)
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
Agate
Chalcedony (cryptocrystalline variety of Quartz, SiO2)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Green Aventurine in Host Rock
SiO2 (Quartz with Fuchsite inclusions)
Petrified Wood
Silicified Wood (SiO2)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Amethyst Geode
Silicon Dioxide with trace inclusions of Iron (SiO2)
Red Sandstone
Arenite (primarily Quartz and Iron Oxide)
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)