A cushion diamond pendant is a necklace that features a cushion-cut diamond set into a pendant. The cushion cut is a square or rectangular shape with rounded corners, giving it a soft and elegant appearance. The diamond used in a cushion pendant can vary in size and quality, depending on the desired effect and budget. The pendant itself can be made of various materials, such as white gold, yellow gold and rose gold. A cushion diamond pendant is a classic and sophisticated piece of jewellery that can add a touch of luxury and glamour to any outfit.