Hello, I am just wondering if a different stone can be an engagement ring. Does it always have to be a diamond ring? I am asking because my brother's fiance is very fond of rubies and a big ruby that is diamond cut would make her go crazy! I just know that she would prefer the ruby as the engagement ring over a diamond as the main stone. I for one am an "outside of the box" person and I have never been married so I say that it is okay to get something different. But I do not want to use my own lack of experience to convince my brother that he should get a ruby ring when it would be the best to get a diamond ring. Thanks for any input!