Sandstone with Tafoni Weathering
Arenite (SiO2 based)
Category
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Sandstone with Tafoni Weathering
Arenite (SiO2 based)
Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
Iron-Stained Quartz (Riverside Cobble)
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
Clear Quartz
Silicon Dioxide (SiO2)
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with various inclusions
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Citrine
SiO2 (Silicon Dioxide)
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Milky Quartz (with Iron Oxide staining)
Quartz (Silicon Dioxide - SiO2)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Milky Quartz
Silicon Dioxide (SiO2)
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)
SiO2 with TiO2 inclusions (Quartz with Rutile)
Rough Dark Green Sapphire
Corundum (Al2O3)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Peacock Ore (Bornite or Chalcopyrite)
Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Quartz Pebble (Milky Quartz)
Silicon Dioxide (SiO2)
Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate / Chalcedony
Native Silver
Silver (Ag)
Sunkissed Quartz or Hematoid Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone (River Pebble)
Arenite (SiO2 based)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Green Jasper with Quartz veins
Jasper (Silicon Dioxide, SiO2)
Howlite (Dyed Turquoise)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
Rough Emerald
Beryl (Be3Al2(SiO3)6 with Chromium/Vanadium impurities)
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
Diamond
Carbon (C)