Shop for many different types of promise rings from Etsy sellers and create a one-of-a-kind ring by choosing from a variety of customization options. Heart promise rings are a popular choice that can be personalized with different materials, designs, and gemstones. Gold promise rings are classic and easy to style. They can also be customized with different gemstones, accents, and engravings. Promise rings that blend different stones―like purple promise rings, blue promise rings, and pink promise rings―are a popular pick with couples who enjoy a pop of color.