Ever wondered who came up with the brilliant (no pun, of course) slogan, “A Diamond is Forever?” Would you believe, it’s only been around since 1948? De Beers was experiencing a post Depression era slump in sales. Since then, the slogan is identified with emotion and longevity, love and immortality – representing a major change in advertising concepts that promote the feelings about a product, not the product itself. If you enjoy the psychology of sales and, of course, the glitter of diamonds, read the full article appearing in The Washington Post …. .