Green, first and last. The Exquisite Timeless Emerald Ring sets a deep emerald at the centre and keeps everything around it plain enough to stay out of the way. Green is the rarest colour in a jewellery box, which is why one emerald ring does more for a hand than three clear stones ever will. The colour shifts with the light through the day, going deeper indoors and brighter by a window. Why you'll love it: A strong coloured centre stone gives the ring a presence that clear stones cannot match. Wear it as the single point of colour against black, navy or anything neutral. Keeps its setting and its finish through everyday wear without tarnishing or marking your finger. Coloured stones are stocked in small numbers, so this one is worth deciding on.