I had some questions about a relative''s ring handed down to me which, I just learned, has old mine cut diamonds. After reading some posts everyone here sounds very knowledgeable so I was hoping to gather some more information about this ring. I had dated the ring to at least 1925 when it was given to my great aunt, but reading the posts it seems that old mine cut was most common from 1840 to 1890. Is it possible that this ring was new in 1925, or more likely that it was handed down at that time? Is there a way to date diamonds?