A solitaire engagement diamond ring is one of best options if you want to offer a classic elegance to your sparkle, but with a modern twist. There are many beautiful designs for the solitaire diamond engagement ring that you can flaunt on your special day.   A heart-shaped diamond solitaire ring is one of the best designs for an engagement diamond ring. Giving the heart shaped diamond ring to your better half is the best way to show that your heart belongs to her now. Here, a heart shaped diamond is used as the main gemstone, which is secured in a six-prong setting. You can also cluster two pear shaped diamonds on the crown of the ring as well in order to offer the same look, but for an affordable budget range. Another design for a solitaire diamond engagement ring features an oval shaped diamond at the center that is secured using a bezel setting. Furthermore, to complement the sturdy appearance and overall look of the gemstone, a moderately thicker shank is used in this design. Usually, platinum or yellow gold is used in a solitaire diamond engagement ring.