Masonic Curved Rectangle Stainless Steel Freemason Ring / Masonic Ring - Freemason's Jewelry Masonic Rings for Stone Masons / Free Masonry Member. Free Masons Masonary Ring with Masonic symbol (10) Rectangle Mason Ring - 316 Stainless Steel - Top band width: approx. 9-12mm - Comfort Fit Band with chiseled face to give it a sophisticated worn and antique look. Back band width is approximately 8mm. 316L is the highest grade of stainless steel used in the jewelry market. More Masonic Rings Search "Mason Zone" on Amazon t is so good at resisting fade, rust, and corrosion, that it is used in architecture as well as in marine environments. At the same time, it is safe to use for medical purposes inside the body. It will not fade, change color, or leave stains on your body. It doesnt even require any maintenance to keep it looking new. Design: antiqued enamel carved Freemasonry Icon.