Diamond sellers have a new marketing tactic: Convincing women to buy their own diamonds. Women, they say in a campaign called "For Me, From Me," deserve to splurge on themselves with diamond jewelry ...

Melinda’s* engagement ring is a 2-carat diamond in a square mounting. When the petite 37-year-old first got it two years ago, her office mates at a graphic design firm remarked that it looked like a ...

Click here to read more from Slate’s wedding issue. In 1919, De Beers experienced a drop in diamond sales that lasted for two decades. So in the 1930s it turned to the firm N.W. Ayer to devise a ...