Gorb is part of the Lercheltini zone, a famous series of sites where large anatase and other minerals were found. Even gold is found, be it in very rare small pieces. It is a nice walk from Lengenbach high up the mountains, and I visited it once. Few specimen were bought at the fair in Binn (a). https://map.geo.admin.ch/?lang=en&topic=ech&bgLayer=ch.swisstopo.pixelkarte-farbe&layers=ch.swisstopo.zeitreihen,ch.bfs.gebaeude_wohnungs_register,ch.bav.haltestellen-oev,ch.swisstopo.swisstlm3d-wanderwege&layers_visibility=false,false,false,false&layers_timestamp=18641231,,,&E=2661220.68&N=1135297.08&zoom=9&layers_opacity=1,1,1,0.8