Stones/Gems with U

• Unakite

  Real semiprecious stone; common in jewelry.

• Uncut diamond

  A real diamond, just uncut; still a gemstone.

• Uvite

  A tourmaline mineral species; genuine gem.

• uncut diamonds

  Real diamonds described as uncut; valid gem.

• Ulexite

  Real mineral (TV rock), known and natural.

• Uvarovite

  A green garnet mineral; real gemstone.

• Uranite
• uraninite

  Real uranium ore mineral; valid stone name.

• Uno
• Umbalite
• Ullmannite
• uranio
• Ural
• Umbrite

The words in the list Stones/Gems with U come from players of the word game Categories game.