Supplied Choosing the perfect necklace can feel overwhelming when you're faced with dazzling options. Diamond necklaces are available in a wide variety, whereas solitaire diamond necklaces are popular favorites. To pick your favorite, know what makes each piece unique so you can narrow the search down to the one suited to your style, needs and budget. Understanding Diamond Necklaces Diamond necklaces are simply necklaces that have diamonds set within them. This can range from simple, dainty necklaces that have a single diamond to those that are extremely intricate and elaborate.