Just wanted to share a video that I found online that relates to the blue bowl. I thought it was a very well made video about processing concentrates. The video can be found at the prospecting channel.com website and it is titled "How to process gold concentrate: a complete guide" and it features Rob Goreham. Here is the link to the video. Hopefully it will help someone who is looking for information about the blue bowl or processing concentrates.
http://prospectingchannel...old-concentrate.html