Bezel set to the center with one oval cut blue stone, likely Tanzanite (7.0 x 5.0 x 2.74mm) and framed by (16) round brilliant cut diamonds (1.8mm - 1.9mm) with a combined weight of approximately .38 total carat (I-J color, I1 clarity), stamped 14KT and with maker's mark "RJM."
