TriJewels Blue Sapphire Princess Cut Channel Set Eternity Band 1.62 ct tw to 1.91 ct tw 14K Yellow Gold 1.62 ct tw to 1.91 ct tw Natural Princess Cut Blue Sapphire Channel Set Eternity Band in 14K Yellow Gold. Gemstones may have been treated to improve their appearance or durability and may require special care. The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture.