9CT GOLD GREEN TOURMALINE RING SIZE O - RARE STONE - ABSOLUTELY GORGEOUS BUT SADLY UNWANTED GIFT ?

THIS RING WAS PURCHASED IN AN ANTIQUE SHOP IN WALES AS A SURPRISE GIFT BUT UNFORTUNATELY IT IS WAY TOO BIG AND AM UNABLE TO SIZE IT DOWN SO FAR. THE STONE IS THE MOST STUNNING AND VIVID GREEN COLOUR AND I BELIEVE THIS COLOUR OF TOURMALINE IS RARE. THE OTHER STONES SURROUNDING THE STONE ARE CZ I THINK BUT LOOK SO MUCH LIKE DIAMONDS. IT IS A STUNNING RING AND I AM VERY SAD IT WONT FIT ME !!