Black Kohinoor Duetto, Ice Zirconium Engagement Ring, 7 mm The Kohinoor Duetto Frost engagement ring is made of black zirconium. The ring has a stylish hand-made surface pattern, which is unique in each ring. In addition to its stylish appearance, zirconium is a non-allergenic material and is therefore suitable for even the most sensitive skin. Zirconium has the same chemical properties as titanium: it is just as light and durable. The surface of zirconium has been described as hard as copper and durable as steel. The width of the Kohinoor Duetto Frost ring is 7 mm. Domestic Kohinoor rings are made in Hämeenlinna, respecting decades of goldsmithing traditions. Kohinoor is a brand of the Finnish company Kultakeskus Oy, which was founded in the 1960s. Kohinoor is known, among other things, for its diamond cuts and timeless design. The rings are designed to last for decades. Material: Zirconium Color: Black Band width: 7 mm Product number: 006-815 Please note that it is a commissioned work that is made to order. Delivery time about 1-2 weeks from order. View all Kohinoor rings here