Of knot design, centering a Cobalt spinel, accented by black diamonds.
- Spinel weighs approximately 10.90 carats
- Black diamonds weighing a total of approximately 2.25 carats
- Signed COSTAGLI
- 18 karat white gold, marked 750
- Total weight 18.73 grams
- Size 6, center length measures 23.4mm
- Accompanied by a copy of AGL report no. CS1077977, dated 7 September 2016, stating the 10.90 carat Cobalt Spinel is of “Deep Blue” color, with no gemological evidence of enhancements/treatments
