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

O-dominant amphiboles	Onyx	Otjisumeite
O'Danielite	Oosterboschite	Ottemannite
Oberthürite	Opal	Ottensite
Obertiite (Ob) amphiboles	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	Orlandiite	Oxiberaunite
Offretite	Orlets	Oxide garnets (Z charge 6)
Oftedalite	Orlovite	Oxide garnets; Bitikleite group (Z charge 9)
Ogdensburgite	Orlymanite	Oxo-magnesio-ferri-hornblende
Ognitite	Ornithite	Oxo-magnesio-hastingsite
Ohmilite	Orpheite	Oxo-mangani-leakeite
Ojuelaite	Orpiment	Oxy-chromium-dravite
Okanoganite-(Y)	Orschallite	Oxy-dravite
Okayamalite	Orthobrannerite	Oxy-foitite
Okenite	Orthobrochantite	Oxy-schorl
Okhotskite	Orthochamosite	Oxy-vanadium-dravite
Okieite	Orthochrysotile	Oxybiotite
Okruschite	Orthoclase	Oxybismutomicrolite
Oldhamite	Orthocuproplatinum	Oxycalciobetafite
Olekminskite	Orthoericssonite	Oxycalciomicrolite
Olenite	Orthojoaquinite-(Ce)	Oxycalciopyrochlore
Olgite	Orthojoaquinite-(La)	Oxycalcioroméite
Oligoclase	Orthominasragrite	Oxykenomicrolite
Oligonite	Orthopinakiolite	Oxykinoshitalite
Olivenite	Orthopinakiolite group	Oxynatromicrolite
Olivine group	Orthopyroxene group	Oxynatropyrochlore
Olkhonskite	Orthoserpierite	Oxyphlogopite
Olmiite	Orthowalpurgite	Oxyplumbobetafite
Olmsteadite	Osakaite	Oxyplumbopyrochlore
Olsacherite	Osarizawaite	Oxyplumboroméite
Olshanskyite	Osarsite	Oxyspinel group
Olympite	Osbornite	Oxystannomicrolite
Omariniite	Oscarkempffite	Oxystibiomicrolite
Omeiite	Oskarssonit subgroup	Oxyuranobetafite
Ominelite	Oskarssonite	Oxyvanite
Omongwaite	Osmiridium	Oxyyttropyrochlore-(Y)
Omphacite	Osmium	Oyelite
Omsite	Osumilite	Oyonite
Oncophyllite	Osumilite Group	Ozerovaite
Ondrušite	Osumilite-(Mg)	Ozocerite
Oneillite	Oswaldpeetersite
Onoratoite	Otavite

All minerals by alphabet

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z others