Wow Factor: What's more special than when your intended presents you with a custom-designed ring? Brad Pitt, who finally popped the question to Angelina Jolie, did so with a ring he designed with the help of her regular jeweller. Each diamond was apparently specially sourced and cut to fit perfectly onto Angie's finger. Then there is Olivier Martinez who gave fiancée Halle Berry a custom-made emerald engagement ring that reportedly cost six figures. Even Eva Longoria, Victoria Beckham and Avantika (Imran) Khan were given custom-designed rings. Can you see the trend here?
Ouch Factor: There are some gorgeous engagement rings out there what are studded with the craziest, biggest rocks (remember that sapphire and diamond engagement ring Prince William gave Kate, now the Duchess of Cambride?) that jewellery designers have created. And while they're an acceptable choice (hey, it was Princess Di's ring!), a ready-to-wear ring doesn't quite pack the same romantic punch as having your beau design one just for you, does it?