Diamonds aren’t actually worth that much. It has a very troubled history involving exploitation and slavery among other disturbing subjects. The price is kept artificially high by a huge cartel and good marketing saying artificial diamonds aren’t as good as the “real” diamonds. In reality artificial diamonds are better in every way, but I guess it’s the slavery that adds that je ne sais quoi.
It’s just become steeped in tradition, and sorry to be a stereotypical edgelord and quote Rick Sanchez but scientifically, traditions are an idiot thing.
There is something to be said for diamonds as everyday jewelry; being the hardest material out there makes them hella durable.
But, jewelry is 100% a complete scam.
Literally ‘I don’t know what’, it means a special something that gives a thing a unique charm.