A promise diamond ring is actually a pre-engagement ring that is gifted to your better half as a token of commitment and love. You will have to make sure that the ring that you choose for your partner is so enchanting that she cannot refuse. Usually, people choose any of the trending diamond ring designs for their partner in order to impress them. However, diamond ring trends change every other day and she will not be able to flaunt it after a few days if you’re not careful. So, it always better to go for a ring that suits her personality as well as her style. Another important thing that you must consider is that you must always choose a cheap diamond promise ring. If you gifted a luxurious diamond ring to your better half, she may mistake it for an official proposal and it may hurt her feelings if you cleared the misunderstanding. One of the trendy designs for a cheap diamond promise rings flaunts a 0.4ct solitaire at the center of a 22k yellow gold band. In order to add to the overall style of the ring, the diamond ring band is beautified by giving some intricate detailing. You can also engrave some quotes on the ring if you prefer. Note that machine engraving is more affordable than hand engraving.