Rough Ruby
Corundum (Al2O3) with Chromium traces
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Rough Ruby
Corundum (Al2O3) with Chromium traces
Quartzite River Rock
Quartzite (SiO2)
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
Granite Gneiss
Gneiss (quartz-feldspar dominated)
Serpentinite
Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)
Greenstone / Serpentinite
Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn silicate minerals including Antigorite, Lizardite, and Chrysotile)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Quartzite River Pebble
Metamorphic Quartzite (SiO2)
Quartzite pebble
Quartzite (SiO2)
Marble
Recrystallized Carbonate Rock (CaCO3)
Quartzite (Ferruginous)
Quartzite (major component SiO2 with Fe2O3 impurities)
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2 with iron oxide inclusions)
Jasper
Jasper (SiO2)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, or Chrysotile)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Quartz (Gray/Smoky Variety)
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Banded Quartz
Silicon Dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Quartzite Pebble
Quartzite (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Serpentinite
Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)
Unakite
Epidotized Granite
Quartzite (River Pebble)
Metamorphic rock consisting primarily of Quartz (SiO2)
Gneis
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Serpentine (Serpentinite)
Serpentinite (complex of minerals including Antigorite, Lizardite, and Chrysotile); (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Quartzite
Quartzite (SiO2)
Sandstone
Arenite (SiO2 principal)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
Quartzite
Quartzite (primarily SiO2)
Pyrite
Iron Sulfide (FeS2)