Bullion is bars or ingots of gold, silver and other precious metals. The purity and mass of bullion bars are specific and regulated by market bodies. This bar was 10 troy ounces of .999 fine silver.
The bar was first cut in half using a chisel which split the bar like a knife instead of a saw which would create a kerf and subsequent loss of material. Once split the two chunks of bullion are hammered on an anvil, thinning and rounding, into a flat disc. When the disc is shaped the raising process begins. The first step is sinking, hammering the discs into a wooden block with a concave dish to form a shallow bowl. Once a bowl shape is formed successive courses of hammering are performed to “raise” the wall of the cups.