U
Ullmannite
Ulrichite
Undefined (analysis inconclusive)
Undefined Mg-Sulfate (analysis inconclusive)
Unknown (not analysed so far)
Unnamed (Gordaite related)
Uralite
Uranocircite
Uranophane
Uvarovite (Garnet Group)
Uvite
Ullmannite
Ulrichite
Undefined (analysis inconclusive)
Undefined Mg-Sulfate (analysis inconclusive)
Unknown (not analysed so far)
Unnamed (Gordaite related)
Uralite
Uranocircite
Uranophane
Uvarovite (Garnet Group)
Uvite