This is not exactly news but I found it reported again today that De Beers have introduced a range of synthetic, laboratory made diamonds which will sell at about a tenth of the price of the natural stone.
A surprising development as I would have thought it competes with their natural trade. Personally I have never bought the notion that diamonds are a good investment as they lose about 50% of their value the moment you have walked out of the retail store. Although as a fallback in times of warfare and for refugees they do have the advantage of being portable and light weight.
https://money.cnn.com/2018/05/29/news/companies/de-beers-man-made-diamonds/index.html
