This Classic Diamond Solitaire Design is one of the Best.  We have this ring set with a 2.50 carat Lab Grown Diamond, VS+ clarity and F+ color.  We use 14k yellow gold with 14k white gold prongs.  Notice the connecting bar between the prongs under the girdle of the diamond.  This feature makes the ring strong and sturdy to prevent any movement of the prongs.  We have made this ring from a 1 carat size up to 5 carat sizes.  The video we are showing is a recent ring we sold with a 5.22 carat oval diamond.