About Solitaire Promise Rings. All our Solitaire Promise Rings are available in a choice of gems and precious metals. You can also add your own personal meaning to any of our Solitaire Promise Rings, creating a beautiful memory and brilliant reminder. We use only the highest quality materials to craft our Solitaire Promise Rings with meticulous attention to detail. Our precious metals are recycled or responsibly mined. We hand-select each conflict-free gem in to perfectly complement your selection from our Solitaire Promise Rings. The profile, textures, and details of our Solitaire Promise Rings add individuality and style to everything you wear. When our work is done and you open that box, you'll see your design from our Solitaire Promise Rings is even more striking when brought to life in the finest precious materials.