All minerals, synonyms and varieties beginning with letter = O, ö, Ö.

O-dominant amphiboles	Onyx	Otavite
O'Danielite	Oosterboschite	Otjisumeite
Oberthürite	Opacite	Ottemannite
Obertiite (Ob) amphiboles	Opal	Ottensite
Oberwolfachite	Opal-AN	Ottohahnite
Oboyerite	Ophirite	Ottoite
Obradovicite group	Oppenheimerite	Ottoliniite
Obradovicite-KCu	Orangite	Ottrélite
Obradovicite-NaCu	Orcelite	Otwayite
Obradovicite-NaNa	Ordoñezite	Oulankaite
Odigitriaite	Oregonite	Ourayite
Odikhinchaite	Oreillyite	Oursinite
Odinite	Organovaite group	Ovamboite
Odinite-1T	Organovaite-Mn	Overite
Odintsovite	Organovaite-Zn	Owensite
Oenite	Orickite	Owyheeite
Örebroite	Orientite	Oxammite
OFF zeolite structure group	Orishchinite	Oxiberaunite
Offretite	Orlandiite	Oxide garnets (Z charge 6)
Oftedalite	Orlets	Oxide garnets; Bitikleite group (Z charge 9)
Ogdensburgite	Orlovite	Oxo-magnesio-ferri-hornblende
Ognitite	Orlymanite	Oxo-magnesio-hastingsite
Ohmilite	Ornithite	Oxo-mangani-leakeite
Ojuelaite	Orpheite	Oxy-chromium-dravite
Okanoganite-(Y)	Orpiment	Oxy-dravite
Okayamalite	Orschallite	Oxy-foitite
Okenite	Orthoamphibole	Oxy-schorl
Okhotskite	Orthobrannerite	Oxy-vanadium-dravite
Okieite	Orthobrochantite	Oxybiotite
Okruschite	Orthochamosite	Oxybismutomicrolite
Oldhamite	Orthochrysotile	Oxycalciobetafite
Oldsite	Orthoclase	Oxycalciomicrolite
Olekminskite	Orthocuproplatinum	Oxycalciopyrochlore
Olenite	Orthoericssonite	Oxycalcioroméite
Olgite	Orthogersdorffite	Oxykenomicrolite
Oligoclase	Orthojoaquinite-(Ce)	Oxykinoshitalite
Oligonite	Orthojoaquinite-(La)	Oxynatromicrolite
Olivenite	Orthominasragrite	Oxynatropyrochlore
Olivine group	Orthopinakiolite	Oxyphlogopite
Olkhonskite	Orthopinakiolite group	Oxyplumbobetafite
Olmiite	Orthopyroxene group	Oxyplumbopyrochlore
Olmsteadite	Orthoserpierite	Oxyplumboroméite
Olsacherite	Orthowalpurgite	Oxyspinel group
Olsenite	Osakaite	Oxystannomicrolite
Olshanskyite	Osarizawaite	Oxystibiomicrolite
Olympite	Osarsite	Oxyuranobetafite
Omariniite	Osbornite	Oxyvanite
Omeiite	Oscarkempffite	Oxyyttrobetafite-(Y)
Ominelite	Oskarssonit subgroup	Oxyyttropyrochlore-(Y)
Omongwaite	Oskarssonite	Oyelite
Omphacite	Osmiridium	Oyonite
Omsite	Osmium	Ozernovskite
Oncophyllite	Osumilite	Ozerovaite
Ondrušite	Osumilite Group	Ozocerite
Oneillite	Osumilite-(Mg)
Onoratoite	Oswaldpeetersite

All minerals by alphabet

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