This helps them check out and pick from myriad couple diamond ring design options, after deciding on one that amply symbolizes their relationship. There are things you could go by while choosing a couple diamond rings.     If you are looking for matching diamond rings, the best option to consider is a pair of platinum diamond bands. In this case, you would normally not need to worry about whether or not the sparkler suits your relationship, personality, and style. Platinum and diamonds form a timeless pair and can be the right beginning right for almost any kind of relationship. Twin diamond rings may seem too clichéd after a while. For a unique twist on things, you could choose the same center diamond, but with different metal settings. Besides, the center stone of your ring is the main star, defining your relationship with each other. When it comes to side stones and other metal settings, you could consider something which complements your respective personalities and styles.   If you prefer twin diamond rings though, there is the upside of always being able to upgrade your rings in the future.