Lot 13. A sapphire, Colombian emerald and diamond jabot pin, Raymond Yard. Estimate US$ 16,000 - 18,000 (€15,000 - 17,000). Photo: Bonhams.

of shield-shape design, set with a round cabochon emerald, embellished with two old European-cut diamonds, weighing an approximate total of 2.00 carats, further enhanced by single and round brilliant-cut diamonds, the second clip set with an oval-shaped cabochon sapphire, with round brilliant-cut diamond accents; signed Yard; mounted in platinum; length: 1 1/2in. 

Accompanied by AGL report # 1082145 A and B, dated March 1, 2017, stating the sapphire as: Cambodian (Pailin) origin, no indications of heat or clarity enhancement and the emerald as: Colombian origin, insignificant to minor clarity enhancement.

Bonhams. FINE JEWELLERY, 24 Apr 2017, 15:00 EDT, NEW YORK