Not mine but I bought some from this eBay seller. I contacted him before purchase and he said he believed it to be Zamak 3 alloy but wasn't certain. It is a very common alloy. I can't verify that but the delivered price per pound isn't bad. The "scabs" are actually little gates about the size of your finger nail. They melt quickly and are easy to add as additions to your melt by weight. https://www.ebay.com/itm/254252011339?ViewItem=&item=254252011339 Best, Kelly
That is an attractive price. At 4% aluminum it seems you could make good brass with copper and a little lead.