“A team in the US has brought the world one step closer to cheap, mass-produced, perfect diamonds. The improvement also means there is no theoretical limit on the size of diamonds that can be grown in the lab.”

“A team led by Russell Hemley, of the Carnegie Institute of Washington, makes diamonds by chemical vapour deposition (CVD), where carbon atoms in a gas are deposited on a surface to produce diamond crystals.”

the artificial diamonds have a brownish tint but after microwaving them, the diamond gets a little smaller but perfectly clear( like on the left and right))

“The improving quality of synthetic diamonds threatens the natural diamond market.
The new technique is so efficient that the synthetic diamonds contain fewer impurities than those found in nature, says Meng. “We once sent one of our lab-grown diamonds for jewellery identification, it wasn’t told apart from natural ones,”

the full story can be found here