You sound like you might be familiar with seventh day Adventists, or at least as, um, frugal as one of us.
Our church has historically decried spending a lot of money on jewelry, as well as just wearing it. So fr many years guys would buy their fiancé an engagement watch, and she would wear it on her right wrist to indicate she was engaged. I bought one for my wife, a nice one with small yet tasteful diamond chips on the face. It was beautiful and affordable. I couldn't have afforded a diamond ring, and she was wise enough not to insist on one.