I have been given a Dore Bar by a friend as payment for helping him out of one of life's ugly Jams. Its a smelted metal bar about 10" long, 1/2" thick and 3" wide, weighs a good 7-8 lbs. It was given to my friend as a bonus when he worked for a small mining concern here in AZ about 30 years ago and has sat in his garage ever since, he has 12 of these bars. He says it is a combination of gold, silver, copper and platinum - the extent of each is unknown, varies from bar to bar. I know I need an assay report but that can get expensive - any other ideas?