Your proposed engineered randomness goes against almost everything making lab grown diamonds popular -- pseudo mined diamonds would cost more than flawless ones and increasingly no one cares what DeBeer's exotic lab tests think. Your post didn't ring LLM to me, it just seemed disconnected from the article and market trends.

What I'd pay more for is an exotic color or multicolor diamond (a diamond built around a ruby?). Or one that changed color depending on the lighting -- picture moonlight turning it a brilliant blue or purple (basically I want it to come from Middle Earth). Or one that glowed red in the dark.

Actually, I wouldn't be the target for this, but I'd love it if they existed.

Have you heard of Alexandrite? I came across it thanks to Elite Dangerous