Source for gold and silver granules: SPM corporation Armonk, New York
Very very expensive, very very perfect. SPM makes “perfect” balls for
the semi-conductor industry. No flat sides on those balls! Precious
metals are a very small sideline for them. Cost is staggering. Get a
group together and buy in bulk. If you don’t need much, make your
own. It’s easy, but they will not be as perfect as SPM’s.