the.com/engagement ring

A diamond-shaped invoice for the rest of your life, paid upfront.

means A ring given to signal a promise of marriage, worn as public proof that someone has already said yes.

from The custom traces back to Roman times, when betrothal rings — sometimes iron, sometimes gold — symbolized a binding contract rather than romance. The diamond specifically owes less to ancient love and more to a famous 20th-century De Beers ad campaign ('A Diamond is Forever'), which turned a geological commodity into an emotional requirement. The word 'engage' itself comes from Old French 'engager,' meaning to pledge or pawn — so, fittingly, you were always putting something up as collateral.

origin
de beers invented two months salary rule
tradition age
mass popularity only since 1930s ad campaigns
resale value
drops roughly 50 percent the moment you buy it
first diamond ring
archduke maximilian gave one in 1477
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