(IDEX Online) - A necklace with over 117 carats of emeralds and diamonds sold at auction for almost $7m.Edmond Chin, the Singapore-born jewelry designer, created the one-of-a-kind piece for the Geneva-based Maison Boghossian, and it was sold at Christie's Hong Kong - where he started his career working in the jewelry and jadeite department.It sold for $6.99m, a fraction below the estimate of $7.09m to $10.32m (converted from HKD).The emerald and diamond double riviere necklace (pictured) was made of 28 cushion and octagonal-cut Colombian emeralds of 10.41 to 1.48 carats, 22 oval and rectangular-cut diamonds of 4.22 to 0.70 carats, vari-cut diamonds, fancy-cut jadeite and gold.The diamonds are 4.22 to 0.70 carats, D to F color, VVS1 to SI1 clarity, as certified by GIA, with a total weight of 48.01 carats.