Meanwhile, an antique ring is a wonderful choice for those who love unique style and sustainable design. Zoe Kravitz opted for an antique five stone ring (below), each of the stones a rose cut diamond – one of the oldest cuts of diamonds around. These cuts were made to twinkle by candlelight, and are really rather magical.  Rooney Mara is another actress sporting an older cut – in fact hers, a portrait cut, is perhaps the very first cut to have been devised for a diamond. A portrait cut is entirely flat, without facets – the perfect choice for a woman whose style is understated and self-assured. Look to auctions but also antique jewellery stores; Matthew Weldon has recently taken over Dublin’s Courtville Antiques; he has a beautiful selection and often takes pieces around the country to antique shows so do keep an eye on his Instagram for both a beautiful selection of jewels but also to see where he might be popping up near you.

And if all fails – we’d never say no to JLo’s choices! Lopez (above) has always favoured an emerald cut – perhaps because they’re one of the most elegant ways to a wear a very substantial stone on a finger, and hers is definitely what you would call substantial, being in the 10-15 carat mark. Jennifer Lawrence also received an emerald cut ring, although in a slightly more wearable (but still very generous) 4ct-ish size. In terms of the cut, they are wonderfully glamorous, with clean symmetrical lines – because of this, the stone needs to be much cleaner than their round counterparts as there is nowhere for inclusions to hide!

In my mind, a clarity grade of VS or above is essential, no matter the diamond size. Look to classic jewellers, like Tiffany & Co. (above) and Weir & Sons for the best selection; Adam’s Auctioneers also have incredible options in their forthcoming February 11 sale. If nothing but an OTT stunner will do but your accountant disagrees, our eye has been drawn to this zircon (a natural stone, unrelated to cubic zirconia!) stunner, coming up in the February 19 auction at O’Reilly’s Auction Rooms.