A hexagonal carved emerald, cultured pearl and diamond necklace. Estimate HK$950,000 – HK$1,500,000 (US$120,000-190,000). Photo Christie's Image Ltd 2015

The central hexagonal emerald carved on both sides with floral motifs, Indian early-mid-19th century, set within a brilliant-cut diamond 24k gold frame, joined to two-strands of round cream cultured pearls measuring approximately 9.0 - 9.4 mm, to the diamond-set clasp, mounted in rose gold, 37.3 cm long

Christie's. HONG KONG MAGNIFICENT JEWELS, 2 June 2015, Hong Kong