At the end of the day, it all comes down to price. That is why Pat Chung prefers lab-grown diamonds. The 36-year-old Hongkonger says they are much cheaper than a natural diamond for the same quality and size and they are easier to source. “I searched for the exact colour, size and shape that I wanted and sent it to my jeweller,” Chung says, adding that more people are opting for lab-grown diamonds compared to a decade ago. The global trend shows how dramatically the diamond business has changed...