Global natural diamond production has officially fallen below 100 million carats for the first time since 2004, marking a permanent shift in market supply. At the same time, De Beers is shaking up its distribution network with sweeping cuts to its Sightholder list under a new Botswana contract framework. Meanwhile, a 500% explosion in old mine-cut diamond sales, sparked by Taylor Swift, is rewriting retail trends. In episode four of The Diamond Dudes debate the structural forces reshaping natural and lab-grown retail economics.