Mint and Coins Project back to metals In 2010, I embarked on a study of economies and currencies as value-carrying talismans within them. As part of that project, I designed and had constructed a simple striking mint. In that mint I struck a run of 32 fine silver (.999 pure) coins and one electrum coin called “zeroes”.struck inside crater of Mt. Tabor just after sunrise 12/22/2011average size 13-14mm in diameter, 1.60-1.80mm thickmost with irregular “landscape” edges and varying “star” points on faces