Sam ordered the raw materials, so on day one of the build, I began with two four-inch lengths of platinum in different gauges, or thicknesses -- one for the actual ring, one for the details. As he typically does on more involved designs like this, Sam built the same ring out of cheaper palladium alongside me, so he could demonstrate each step but let me do it on my ring. Since I wanted the ring to have a groove down the center, I actually made two rings, slightly flattened, and soldered them together. Soldering at this scale is crazy: The solder is a platinum alloy that melts at a slightly lower temperature than the ring platinum, and it comes in sheets that Sam cuts into flakes about the size of glitter. With tiny tweezers, you set a flake over the joint you want to seal, try not to look at it wrong lest it move, then heat it with a small oxypropane torch until it melts -- and not a second longer or you could melt the ring. You also use the torch frequently to anneal the platinum: heat it red-hot for 30 seconds and then cool it, to realign the crystals and make it less brittle.