Partnership between diamond miners and Chow Tai Fook aims to boost demand for mined rocks in China, particularly among young consumers.

India, where the majority of diamonds are cut and polished, is grappling with one of the world’s deadliest surge in infections.

Argyle, the world’s biggest and the main global source of high-quality pink diamonds, ceased operations last year.

According to the scientists behind the study, this is a potential breakthrough not only in the study of diamonds but of planetary evolution.

The Spectacle, which was cut from a rough stone discovered by Alrosa in 2016, took a year and eight months to prepare and polish in Moscow.

The miner had been accused of being responsible for widespread human rights violations at the Williamson mine in Tanzania.