Many laboratory-grown diamond companies describe their diamonds as being green or eco-friendly and use words such as ‘greenhouse’ or ‘foundry’ to try and influence opinion. [Consumers] are also being told that [synthetic] diamonds are real diamonds without the human or environmental impact. This is a misrepresentation. They deceive the consumer, because a synthetic diamond is not worth much at retail value. Millennials are being fed lies, because the gap between reality and marketing is huge.
Sahag Arslanian, Arslanian Group, speaking at the Mining Indaba, from "Millennials being lied to by synthetic diamond manufacturers".