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Mineral Index - O

• Orthotaenite
  syn. of Taenite

• Orthotorbernite
  syn. of Torbernite

• Orthowalpurgin
  syn. of Orthowalpurgite

• Orthowalpurgite
  Orthorhombic
  (BiO)₄(UO₂)[AsO₄]₂ · 2H₂O

• Orthozoisite
  syn. of Zoisite

• Ortite
  syn. of Allanite

• Ortochevkinite
  syn. of Orthochevkinite

• Ortoclasa
  syn. of Orthoclase

• Ortoclase
  syn. of Orthoclase

• Ortoclasio
  syn. of Orthoclase

• Ortoklas
  syn. of Orthoclase

• Ortoklaz
  syn. of Orthoclase

• Ortose
  syn. of Orthoclase

• Ortstein
  syn. of Limonite

• Oru
  syn. of Gold

• Oruetite
  syn. of Joséite

• Orvillite
  var. of Zircon
  near 9ZrO₂·6SiO₂·5H₂O

• Oryzite
  syn. of Epistilbite

• Osakaite
  Triclinic
  Zn₄(SO₄)(OH)₆ ·5H₂O

• Osanite
  syn. of Riebeckite

• Osannite
  syn. of Riebeckite

• Osarizawaite
  Trigonal
  Pb(Al,Cu)₃[(OH,H₂O)₃|SO₄]₂
• Osarsite
  Monoclinic
  (Os,Ru)AsS
• Osbornite
  TiN

• Oserskite
  syn. of Aragonite

• Osm
  syn. of Osmium

• Osmi
  syn. of Osmium

• Osmij
  syn. of Osmium

• Osmijs
  syn. of Osmium

• Osmijum
  syn. of Osmium

• Osmín
  syn. of Osmium

• Osmio
  syn. of Osmium

• Ósmio
  syn. of Osmium

• Osmiridium
  var. of Iridium

• Osmiridium (of Zvyagintsev)
  syn. of Iridium

• Osmis
  syn. of Osmium

• Osmiu
  syn. of Osmium

• Osmium
  Hexagonal
  (Os,Ir,Ru)

• Osmiyûm
  syn. of Osmium

• Osmiyum
  syn. of Osmium

• Osteolith
  var. of Apatite

• Ostranite
  syn. of Zircon

• Ostwaldite
  syn. of Chlorargyrite

• Osumilite
  Hexagonal
  (K,Na)(Fe²⁺,Mg)₂(Al,Fe³⁺)₃(Si,Al)₁₂O₃₀

• Osumilite-(Fe)
  syn. of Osumilite
  Hexagonal

• Osumilite Group
  group name

• Osumilite-(Mg)
  Osumilite Group. The Mg analogue of Osumilite. Published without IMA approval, with first recorded locality being Tieveragh, Co. Antrim, Northern Ireland, UK.
  Hexagonal
  (K,Na)(Mg,Fe)₂(Al,Fe)₃(Si,Al)₁₂O₃₀·H₂O

• Osumilith
  syn. of Osumilite

• Osumilith-(Mg)
  syn. of Osumilite-(Mg)

• Oswaldpeetersite
  Monoclinic
  (UO₂)₂[(OH)₂|CO₃] · 4H₂O
• Otavite
  Trigonal
  CdCO₃
• Otjisumeite
  Triclinic
  PbGe₄O₉
• Ottemannite
  beta Sn₂S₃
• Ottensite
  Hexagonal
  (Na,K)₃[Sb₂O₃]₃[SbS₃]· 3H₂O
• Ottrélite
  (Mn²⁺,Fe²⁺,Mg)Al₂[O|(OH)₂|SiO₄]
• Otwayite
  Orthorhombic
  Ni₂CO₃(OH)₂·H₂O

• Ouatite
  syn. of Wad

• Oulankaite
  Tetragonal
  (Pd,Pt)₅(Cu,Fe)₄SnTe₂S₂

• Oulongaite
  
  (Pd,Cu,Fe)₉SnTe₂S₂

• Oulopholite
  syn. of Gypsum

• Ourayite
  Orthorhombic
  Ag₃Pb₄Bi₅S₁₃

• Ouro
  syn. of Gold

• Ouro Verde Quartz
  syn. of Smoky Quartz

• Oursinite
  Orthorhombic
  (Co,Mg)(UO₂)₂[HSiO₄]₂ · 6H₂O

• Ouvarovite
  syn. of Uvarovite

• Ovamboite
  Isometric
  Cu₂₀(Fe,Cu,Zn)₆W₂Ge₆S₃₂
• Overite
  Orthorhombic
  CaMgAl[OH|(PO₄)₂] · 4H₂O

• Overite Group
  group name

• Owensite
  Isometric
  (Ba,Pb)₆(Cu,Fe,Ni)₂₅S₂₇
• Owyheeite
  Monoclinic
  Ag_3+xPb_10-2xSb_11+xS₂₈, -0.13 < x > +0.20

• Owyhee Jasper
  var. of Jasper

• Oxacalcite
  syn. of Whewellite

• Oxalate of Lime
  syn. of Whewellite

• Oxalite
  syn. of Humboldtine

• Oxalsaures Eisen
  syn. of Humboldtine