All minerals, synonyms and varieties beginning with letter = U.

Uakitite	Unnamed (Ba-analogue of Calcioaravaipaite)	Uramphite
Uchucchacuaite	Unnamed (Ba-Mn Oxalate Tetrahydrate)	Urancalcarite
Udinaite	Unnamed (Ca Arsenate Hydrate II)	Uraninite
Uduminelite	Unnamed (Ce Tungstate)	Uranium Mica
Uedaite-(Ce)	Unnamed (Dimorph of Devilline)	Uranmicrolite
Uhligite	Unnamed (Eudialyte 3248)	Uranocircite
Uintahite	Unnamed (Fe2 -analogue of Brandtite)	Uranoclite
UKI-2004-(OS:BiCuPb)	Unnamed (Fe2 -analogue of Lileyite)	Uranophane
Uklonskovite	Unnamed (Ga-dominant member of the epidote group)	Uranophane Group
Ulexite	Unnamed (Gordaite-related Ca-Zn Sulphate Chloride Hydrate)	Uranopilite
Ulfanderssonite-(Ce)	Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)	Uranopolycrase
Ullmannite	Unnamed (Kogarkoite-like mineral)	Uranopyrochlore
Ulrichite	Unnamed (Mg-analogue of Batagayite)	Uranosilite
Ultrabasite	Unnamed (Mg-analogue of Hopeite)	Uranospathite
Ulvöspinel	Unnamed (Na-Ca-Fe-Silicate-Hydrate)	Uranosphaerite
Ulvöspinel subgroup	Unnamed (Na-Pb Carbonate-Hydroxide II)	Uranospinite
UM1977-03-COSiO:CaClH	Unnamed (Na-Pb Carbonate-Hydroxide)	Uranothorianite
UM1983-09-S:BiPbTe	Unnamed (Nd-analogue of Yttrotungstite-(Ce))	Uranothorite
UM1988-05-S:AgBiCuHgPb	Unnamed (Orthorhombic dimorph of Barstowite)	Uranotungstite
UM1988-06-S:AgBiCuHgPb	Unnamed (P-analogue of Schultenite)	Uransamarskite
UM1999-38-WO:CrV	Unnamed (Partially dehydrated Arsenuranospathite)	Urea
UM2005-31-SiO:CuH	Unnamed (Pb Nitrate I)	Uricite
Umangite	Unnamed (Pb Oxysulphate Hydrate)	Uroxite
Umbalite	Unnamed (Pb13O8(OH)6(NO3)4)	Ursilite
Umbite	Unnamed (Pb2(OH)3(NO3))	Urusovite
Umbozerite	Unnamed (Possible Ca-analogue of androsite-(Ce))	Urvantsevite
Umbrianite	Unnamed (Possible Cr analogue of ferriallanite-(Ce))	Ushkovite
Umohoite	Unnamed (possible Mn2+ analogue of Ferriakasakaite-(La)	Usovite
unassigned zeolite structure group	Unnamed (Possible Mn2+ analogue of uedaite-(Ce))	Ussingite
Ungarettiite (Un) amphiboles	Unnamed (possible Mn2+ analogue of uedaite-(Nd))	Ustarasite
Ungavaite	unnamed (vacancy-rich, partially inverted spinelloid silicate)	Usturite
Ungemachite	Unnamed Pt(Cu0.67Sn0.33)	Utahite
Ungursaite	Upalite	Uvanite
unidentified	Uralborite	Uvarovite
unnamed	Uralite	Uvite
Unnamed (Arseniosiderite-related mineral)	Uralolite	Uytenbogaardtite
Unnamed (Ba Thiosulphate Monohydrate)	Uramarsite	Uzonite

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