My fiancee&#x27;s ring doesn&#x27;t have any sort of diamond in it. We wouldn&#x27;t want to spend our lives together <i>even more</i> if it did. An engagement ring isn&#x27;t an investment where the aim is to get &quot;value for money&quot;; it&#x27;s a symbol that says you want to share the rest of your life with someone. What it&#x27;s made of is irrelevant. What it denotes is the important bit.