About Black Diamond Engagement Rings. All our Black Diamond Engagement Rings are available in a choice of gems and precious metals. You can also add your own personal meaning to any of our Black Diamond Engagement Rings, creating a beautiful memory and brilliant reminder. We use only the highest quality materials to craft our Black Diamond Engagement 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 Black Diamond Engagement Rings. The profile, textures, and details of our Black Diamond Engagement 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 Black Diamond Engagement Rings is even more striking when brought to life in the finest precious materials.