Noble Shungite Ring, Raw Square, 925 Sterling Silver, Size 8Lovely Square of Noble Shungite with an attractive rugged unpolished natural surface. Simple setting in 925 Sterling Silver with an open back holds the stone securely without distractions. The split band makes for greater stability and comfort on the finger. Regular Shungite only has up to 60 % Carbon but Noble Shungite has over 90 % . It's heavier, more beautiful with it's Silver or Gold Sheen and shiny surface. It has a more powerful and focused