"Jewelers must say whether diamonds are mined or synthetic: U.S. FTC"

Reuters:

The U.S. Federal Trade Commission, which investigates allegations of deceptive advertising, has sent warning letters to eight companies to insist they distinguish in advertisements between diamonds from mines and those made in laboratories

...

De Beers has responded to pressure from laboratory-grown diamonds by tearing up its decades-old policy of only selling natural diamonds in jewelry and beginning to sell synthetic stones.

It sells the lab-made diamonds for less than rivals to emphasize the difference between what it sees as fun, fashion jewelry and natural diamonds created in the earth

As Bruce Sterling wrote,

Insist on purchasing organic Slow Diamonds, fully-natural lumps of carbon artisanally dug by hand right out of Mother Earth

*Previously: Popcap made a ring for the wedding anniversary of a fan of Bejeweled.