Many an LDS ring ceremony has explained how the circular ring goes on and on without an end, just as the ordinance of temple sealing itself. ... The engagement ring has become such an integral part of the proposal that most women agree that it's hard to feel engaged without one.
Do LDS wear wedding rings?
Temple marriage, the sealing of bride and groom for time and eternity, is a simple, sacred ceremony. ... The wedding ring has no part in this sacred ceremony because the placing of a ring upon the finger of husband or wife is strictly a social custom.