It is said that diamonds are a girl's best friend, so it was no surprise to see plenty of young women at the opening of the De Beers Diamond Jewellers store in Kowloon's Elements mall. The special guests at last Thursday's opening were two celebrity mothers, mainland actress Vicky Zhao Wei and home-grown star Karena Lam Ka-yan. The two working mums shone like their multi-carat jewellery. Lam, who is planning a film industry comeback after giving birth to her daughter, Kayla, just over a year ago, said becoming a mother had made her more appreciative of diamonds. 'Diamonds are a treasure from mother nature. A timeless, elegant piece can be such a great family heirloom to pass on to my daughter,' she said. There is no doubting, however, that her daughter is more precious to her than diamonds. 'Now Kayla's 14 months old so I can come out and work again. But I pick jobs that won't separate us for longer than a day,' she said. 'There has only been one exception so far. I had to fly to Beijing for work, but I missed the last flight back so I had to stay over for one night and took the earliest one back in the morning. I don't think I could bear being parted with her for any longer.' Some girls might say the same about diamonds.