Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
Category
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Slag
Anthropogenic Vitrification Product / Silicate Slag
Halite
Halite (NaCl)
Pyrite
Iron Disulfide (FeS2)
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
Quartz Pebble (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Agate (Chalcedony)
Cryptocrystalline Silica or Silicon Dioxide (SiO2)
Petrified Wood (Jet or Coalified Wood appearance)
Silicified wood (principally SiO2) or Carbonized Wood
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Citrine Quartz
Silicon Dioxide (SiO2)
Silver (Native Silver)
Native Silver (Ag)
Chert (specifically Yellow Jasper)
Sedimentary Cryptocrystalline Quartz (SiO2)
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
Vesicular Basalt
Vesicular Basalt
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pebble
Clast (specifically a granule or small pebble)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
Clear Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine/Gold Quartz)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Smoky Quartz in Matrix
Silicon dioxide (SiO2) within Pegmatite/Gneiss
Basalt
Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
Sandstone
Arenite (primarily Quartz, SiO2)
Clear Quartz
Silicon dioxide (SiO2)
Rough Diamond
Diamond (pure Carbon, C)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
Chalcedony Nodule (Commonly known as Agate or Chert)
Microcrystalline Quartz (SiO2)
Botryoidal Agate
Silicon Dioxide (SiO2)
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Gold
Native Gold (Au)
Pyrite
Pyrite (FeS2)
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)