9 mm Wide Black Zirconium
Celtic Trinity Knot Design goes all the way around this Wedding Band  

Black Zirconium:

Black Zirconium is a sleek and bold alternative to traditional wedding bands. Black Zirconium is a strong, corrosion resistant metal and will not wear or fade. The metal Zirconium is a gray-white shiny metal, resembling Titanium in appearance, still heavier and resembling more precious metals in its weight and feel. When heat is applied, a black, oxidized, ceramic-like coating forms and is extremely scratch resistant and durable. Unlike other black rings, Black Zirconium rings are black all the way through. In the rare instance that the ring does scratch or chip, more black material will show underneath. Zirconium does not conduct heat well and is relatively inert, making it a great choice for people with base metal allergies.