Ancient Bog Oak is the oldest timber on the planet. Before petrification, timber goes through many stages; dying, falling, and drying. Before this ancient bog oak reached the "drying" stage, it was covered with lichen and moss to blot out the sun/elements and suspend it's return to the earth. It laid in a bog for around 6,000 years (it's patina is the darkest I've ever seen) and was discovered in the western Czech Republic after WW2. All timber is sealed in a vacuum with marine grade epoxy to insure utmost strength and durability of a design. This ring consists of a sandblasted gunmetal dark gray Tungsten Carbide band with an ancient Bog Oak interior. Specs:Band Width: 8 mmBand Thickness: Circa 1.8 mmFit: Comfort fit Materials: Tungsten Carbide, Ancient Bog Oak