Free TrialSubscribeSign In
Precious Metals Assay and Training Institute
After a core sample has been burned away, what is left is a bead of doré, or a semi-pure alloy of gold and silver, that weighed and averaged to determine richness of the sample.
P.O. Box 773026Eagle River, AK 99577-3026Ph: (907) 726-1095
© 2023 North of 60 Mining News
Powered by ROAR Online Publication Software from Lions Light Corporation
© Copyright 2023