By weight, of course, the diamond industry is entirely industrial, gems are a rounding error. By value? Other way around. This source says $1.8B in 2018. https

By weight, of course, the diamond industry is entirely industrial, gems are a rounding error. By value? Other way around. This source says $1.8B in 2018. https://www.grandviewresearch.com/industry-analysis/industrial-diamond-market https://www.grandviewresearch.com/industry-analysis/industri...