Rhodochrosite
Manganese carbonate (MnCO3)
Category
Browse metamorphic specimens identified by the Rock Identifier community.
Rhodochrosite
Manganese carbonate (MnCO3)
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
Green Tourmaline (Verdelite)
Schorl-Elbaite series (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Bornite
Bornite (Cu5FeS4)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Galena
Lead(II) sulfide (PbS)
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Milky Quartz
Silicon Dioxide (SiO2)
Aquamarine
Beryl (Be3Al2Si6O18)
Smoky Quartz
Silicon Dioxide (SiO2)
Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
Pyrite
Iron Sulfide (FeS2)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Clear Quartz (Carved Merkaba)
Silicon Dioxide (SiO2)
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
Serpentinite
Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4
Green Aventurine
Silicon Dioxide (SiO2 with Fuchsite inclusions)
Rough Emerald Crystals
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Smoky Quartz
Silicon Dioxide (SiO2)
Chrysotile Asbestos
Chrysotile [Mg3Si2O5(OH)4]
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
Amethyst (Variety of Quartz)
Silicon Dioxide (SiO2)
Quartz (Milk Quartz / Massive Quartz)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Yellow Aventurine
Silicon Dioxide (Quartz with Mica inclusions) SiO2