Sarah Sheridan

A different kind of tortoiseshell from British jeweller Sarah Sheridan, whose "Tortuga" line of turtle-skin designs is currently 20% off. The sleek pieces above range from £74.40 to £92.80 on sale (blackened pieces only).

Speaking of sales, there's a huge one going on at Frosting (mmm, frosting) — all rings (and all jewellery, in fact) is 50% off. Half price! Think of all the cash you'll have left over for cupcakes!