Jewelry Montana Silversmiths Skyline Stack Ring Set RG6549RG6549 The Skyline Stack Ring Set makes stacking your rings easy and stress free. This set has two rings open in the front with triangle shaped crafted turquoise stones that perfectly frame the middle ring. The silver tone ring has a large, clear cubic zirconia crystal in a rectangular shape and is open in the back, making all the rings adjustable. Mix and match depending on the style that you are looking for. One size fits most. Stone color may vary.