Brass is made from Copper and Zinc. As a substitutional alloy, atoms of the two elements may replace each other in the same crystal structure. All our 1 gram ingot cards have all the element info on the back.
AUTHENTICITY
Each one of our Collectibles comes with the GRAINMINT Hologram Certificate of Authenticity
EXCLUSIVITY
Each one of our Collectibles is Exclusive to and hand packaged and shipped by GRAINMINT
LIMITED
Every one of our Collectibles is numbered with a limited number of each being produced