11 Carat Octagon Cut Bi-Colour Tourmaline – Single Stone DealCheck Out the rare beauty of this 11 carat Octagon cut bi colour Tourmaline, a striking single stone sourced from the mines of Afghanistan. This captivating gem features a unique blend of green and black tones, creating a dramatic contrast that highlights its natural character. Measuring 22. 8 x 8. 4 x 6 mm, the stone showcases a fascinating clarity that is half opaque and half cats eye, offering a mesmerizing play of light and texture. As the