22 Gauge, 935 Argentium Silver, Round, Dead Soft - 10FT by Craft Wire. Argentium Silver is a patented and trademarked alloy that has 93.5% pure silver, just like traditional sterling. What makes it different from traditional sterling silver is that a small amount of germanium replaces some of the copper that is usually the other 7.5% of sterling silver. Argentium Silver presents a bright white color that is closer to fine silver than traditional sterling, yet is highly resistant to firescale and extremely slow to tarnish under most conditions. Jewelry-makers and their customers appreciate the value and convenience of a brighter-white sterling silver that resists tarnish, everyday scratches and dents, and keeps on shining.