Identifying Rocks : Identifying Gold Rocks YouTube
Jun 8,2009Silver is a dominant color over gold in most cases except where copper is abundant.And yes if you have dark colored ore there could be diamonds.that doesn't pick it up.70% of all gold is associated with sulfides(pyrite).
tungsten minerals and deposits USGS Publications Warehouse
Approximate determination of percentage of tungsten in ores.Colo.; B,Cuboid ferberite crystals from Georgia A.mine,Neder land.Colo.A,Wolframite crystal with rounded octahedra of scheeliteA,Scheelite with quartz,pyrite,and galena,from Golden Chest mine,(lead bismuth sulphide) and some smoky quartz.Contact Us