This ring is a unique piece of jewelry with a beveled edge Celtic knot design and black carbon fiber. It is made from tungsten, a sturdy metal that is nickel-free and stackable. The ring is handmade and signed by the seller, with excellent cut grade and metal purity of 999. The ring is suitable for various occasions such as weddings, birthdays, and anniversaries. It is perfect for both men and women and has a band width of 8mm. This vintage ring is a great addition to any collection and can be personalized upon request. The seller offers a warranty, and wholesale options are available.