69.62 kt natural Burma untreated Pink Spinel and Diamond Necklace. Estimate HK$420,000 - 600,000 (US$53,800 - 77,000). Photo Tiancheng International

The openwork filigree necklace decorated with graduated oval pink spinels together weighing 69.62 carats, embellished with brilliant-cut diamonds together weighing approximately 9.35 carats, mounted in 18 karat white gold, length approximately 420mm.

Accompanied by LOTUS report numbered 7559-9362, dated 6 October 2015, stating that the 69.62 carat pink spinels are natural, Pink colour, of rich to medium saturation and medium-light to medium tone, of Burmese origin, with no indications of heating.

Tiancheng International. HONG KONG AUTUMN AUCTION, Jewellery and Jadeite