Diamond giant Alrosa unearths 136.24-carat rock

Russia’s Alrosa (MCX:ALRS), the world's top diamond producer by output in carats, has recovered a 136.24-carat rough diamond from its Nyurbinskaya pipe, a known source of big rocks. The gem-quality rough diamond, which is 3 Black Makeable 1 colour, measures 29.32...