I can only imagine when these carvers didn’t have the more modern electric carving tools, how long even a small piece would take to hand carve, Months and months and months!!! The patience it would have taken to do that is amazing!!!! No wonder those centuries old pieces are so valuable!!!
My first job after leaving the US Army in '75 was as a jade carver in Fairbanks Alaska at The Alaskan Jade Cache. Our material was north American/Canadian nephrite, so quite different from the Burmese stone here. We had 60 tons of good jade ranging from jet black through translucent grass juice green to small amoumts of sky blue. Fun.