Business | Jewelers Must Say Whether Diamonds Are Mined Or Synthetic: U.S. FTC

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

The FTC said that it had found instances where the eight companies advertised diamond jewellery “without clearly and conspicuously disclosing that the diamonds are laboratory – created”, according to the letter.

The agency declined to identify the recipients of the letters. An unredacted version of one the letters seen by Reuters identified that recipient as Diamond Foundry, a California company that makes laboratory diamonds.

Diamond Foundry declined to discuss whether the letter would lead to changes in its marketing. “We pride ourselves on being a lab grown diamond producer and this point of differentiation is what our success is built on”, CEO Martin Roscheisen said in an emailed statement.

Analysts say increased production of laboratory-grown diamonds will lower the price of the stones.

The Diamond Producers Association (DPA), which represents mining companies like De Beers, Rio Tinto and Alrosa, welcomed the FTC insistence that companies distinguish between  diamonds that are mined and those that are made in laboratories.

“The DPA has several months expressed serious concerns about misleading marketing communication and unsubstantiated eco claims coming from many laboratory grown diamond marketers”, said DPA Chief Executive Jean-Marc Liberherr.

De Beers, a unit of Anglo American, said it was pleased by the move, adding the two kinds of diamonds were” distinct product categories”.

De Beers has responded to pressure from lab diamonds by tearing up its decades-old policy of only selling natural diamonds in jewellery 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 jewellery and natural diamonds created in the earth and with a high re-sale value.

Since it began selling synthetic gems as jewellery it said the cost of synthetic stones has plunged.

The FTC, in its letters, also asked the companies to review the use of “eco-friendly” or similar terms to describe diamonds made in a laboratory. “It is highly unlikely that they can substantiate all reasonable interpretations of these claims”, the FTC said in its release.

The first lab-made diamond was produced in 1955 and larger crystals were made in 1970, but the first synthetic diamonds for purchase were not made until 1970s, according to Dr. James Shigley, research fellow at the Gemological Institute of America.

“The lab grown diamonds are diamonds. They have the same physical chemical properties. We’re not talking about an imitation”, he said, noting that many diamonds are sold for grinding or other industrial purposes. h

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