Cavalliserpentring
With the count-down to the final Harry Potter novel begun (and as an ardent fan of the series), I find that I am drawn to just about anything that can be construed as Potter related (Nuts? Moi? Never! Or should I say... "Go! Go! Gryffindor!"). Featuring a beautiful serpent, set with dramatic green malachite, even the Heir of Slytherin himself couldn't turn his nose up at this ring! If you fancy yourself to be power-hungry, cunning and of great ambition (the Sorting Hat's words, not mine!), you can pick yours up for £245 at Net-A-Porter.

Related: Roberto Cavalli’s beaded 'Serpent' clutch | Roberto Cavalli’s velvet bird print belt