The explosion of lab-grown diamonds on the international jewellery market has coincided with a slump in demand, sending the price of smaller natural diamonds to their lowest levels in a decade.
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How the diamond industry lost its sparkle
“We can mass-produce diamonds,” Feng says, proudly pointing to the rows of machines. He has another two factories working around the clock. “Currently, I produce about 100,000 carats a month,”...
