That $4,000 you just plunked down for her engagement ring? That's good for $3,000-something the second she says yes. (If she says yes. If she doesn't, you've got bigger problems.) To paraphrase Carly Simon, de-pre-cia-tion.
Harry Winston Diamond Corp.’s $1 billion sale of a luxury unit to Swatch Group AG provides the cash to invest more in diamond mining, a business that last year was more than twice as profitable as jewelry.