A late friend of mine was a certified gemologist, a diamond grader. No matter what she was brought -- and it could have been a piece of bottle glass in a tinfoil setting -- she had a comment about how interesting the piece was, or how well integrated the setting, or... something. Then, because her job was to value, she'd discuss the size, color, inclusions, and then come up with a number... but always followed that immediately with more apparent praise for the piece, whatever it was, and a remark about heirlooms and family history.
Me, I wear a fairly plain band my husband and I designed together, no stones. I don't take my ring off, I use my hands a lot, and I'm outside a lot. Plus, I don't care for diamonds, even diamonds we know aren't blood diamonds because they've been in the family too long. As the niece of a ring designer, I fear I'd let loose with both barrels at anyone who sneered at my ring.