From an auction perspective, the growth and interest in coloured diamonds are perpetually on the rise. Auctions set the price point attractively, offering an opportunity to bid for a collectible signed piece from the renowned jewellers. But how do we define collectible jewels? What’s on the seasoned jewellery connoisseur’s radar? On Wealth Tracker, Hongbin Jeong speaks to Cristel Tan, International Specialist, Jewellery, Phillips, to find out more.