Tiemannite has been discovered in the Qiongmo micro-disseminatedgold deposit occuring in the Cambrian silicalite and slate in the southern subzone of the WesternQinlingMountains.
For three weeks, the nature programme will be based at RSPB Cymru's 700 hectare Ynys-hir reserve near Machynlleth, with the backdrop of the CambrianMountains.
Representatives from opposition groups Say No to TAN 8, Montgomeryshire Against Pylons, Campaign for the Protection of Rural Wales and the CambrianMountains Society also presented evidence to the committee.
Mr Raw added that his farmhouse had "never looked cleaner" in preparation for the visit and that he would be taking the prince up into the CambrianMountains to see his ewes and cattle before the meeting.