Geoffrey Farrow at Raphael, a jeweller on the other side of the street, can only just bring himself to sell lab-grown diamonds. “They are synthetic,” he said. “Lab-grown sounds exotic, but it’s created – they make it by the buckets. There’s no history to it. The price is going to go down further and further.

“It makes the stone that much cheaper, and people have the illusion that being big is something special. It’s not. It’s quality that you want.”

What the actual fuck is he talking about? Is it the suffering that gives it quality? They’re impossible to tell apart without a magnifying glass.