In search of Yellow Quartz in the Sahara

I went to the Sahara Desert in Chami District of Mauritania. There is a huge hydro-thermal quartz deposit and I was able to find nice yellow and red Quartz in large blocks. During this trip I stayed in this mobile caravan. The landscape was very unforgiving and we carried water and supplies for many days  

  But our trip was successful and we found colorful stones to add to my collection.
The mobile caravan we used was that of a Chinese company called Great Wall.