Diamonds are not scarce. In fact, they are quite common compared to some other minerals.
Diamonds are expensive because their supply is artificially limited by two monopolies, De Beers and Alrosa. If diamonds were manufactured at full capacity, their price would plummet.
Arent Diamonds the most plentiful gemstone on the planet or something like that?
diamonds are so rare every married couple i know has a few.
If you REALLY want to impress your wife with an item of rarity, and a lasting symbol of prestige that will have her other suitors seething in jealousy over you, get her an unissued condition Enfield No.4t Sniper rifle with clear optic and original factory crate.
or do what i did and get her a new Kitchen Aid professional series mixer. apparently chicks dig 600 dollar cooking appliances...least mine did.