In the province of Ratanakiri, in the northeast of Cambodia, the locals are hard at work cultivating a range of produce, from cashews to bananas, sugar cane to glorious blue onyx gemstones.
From the main town Ban Lung, it's a short 18 mile (30 km) two-hour drive over rough roads to the mining town of Chum Rom Bei Srak.
In Chum Rom Bei Srak sorters are busy at work shifting through freshly-mined stones. As they expertly work their way through the pile, stopping occasionally to trim the stones with wire cutters, they check for cracks and flows that will determine whether the stone ends up a precious five carat jewel or less expensive one to two carat stones.