As a result, the facility can churn up to 1 million carats of diamond every year, enough for nearly 500,000 average-size engagement rings. That speed, the company says, makes it possible for lab ...

The man-made diamond boom is over, and prices for ultra-trendy lab-grown diamonds are set to tumble this year, industry veterans say. Paul Zimnisky, a leading diamond analyst, foresees jewelers ...