The gemstones are found 15 meters into the earth. A hole about 3 feet wide is dug straight down. At that depth the soil is collected and sorted. This is all done with minimal tools and no electricity or water. After they are done, the hole is refilled.
They work in couples, as a husband and wife team. The husband digs the hole, and descends into it to collect the dirt. Filling a bucket the wife rolls up and down into the hole. The dirt is then sorted through in search of gemstones.