Cut, clarity, carat weight and colour.
When it comes to picking a diamond the experts say it's all about the four Cs.
Aside from this inside info, we're completely obsessed with the sparkle factor and we've selected twenty rings that will stop you in your tracks (and a couple of wedding bands for good measure).
The festive season is always a popular time for popping the million-dollar question and this gallery could be perfect timing for a little ring inspiration.
However, you don't have to be in a relationship to appreciate sparkles and these designs will please any self-confessed magpie...*
*If you're having trouble viewing the gallery, click to 'show the images as a list'.
