Earth Imager eXp 5000 detects 12 gold coins

During a metal detection on loamy ground a satisfied customer from middle east discovered gold coins inside of a stone. He was using the Earth Imager eXp 5000 with Super Sensor and VLF emitter. In one of his emails he wrote:
"Again i scaned the measured area and in 320 cm i found 12 gold coins inside of stone."