JACOBI ring set with step-cut tourmaline (Verdelith), approx. 17 x 10,5 x 7,4 mm, approx. 11 ct, brilliant-cut diamonds totalling approx. 0.70 ct, good colour and clarity, 18K YG, 7.8 g, ring size 55, 20th/21st century, minor signs of wear, facet edges of the tourmaline minimally chipped, maker's mark, certificate.