When we got married, DH and I didn't have much extra money, so we decided just to get a band and when our 5 year anniversary came up, we would get a nice ring. DH has his mom's wedding/engagement ring set we want to use. The main stone was a marquis, but is no longer there. My question is, can we use another shape stone or do we need to get a marquis again? Any suggestions? TIA!