@dassauerkraut @Soy_Magnus Fairly close.
Large parcels are either bought by Indian cut houses or bought by a foreign dealer hiring the Indian cut hose to process it.
Either rejects get sold off in small parcels mixed with a few good stones to small scale cutters, or people steal rough from the factory.
That changes hands a few times till it ends up in a pile. That pile then sits in India or Pakistan (occasionally Thailand) while brokers online try to flip it to small independent cutters.