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- Free delivery on orders over €50
Kohinoor Duetto Black Rock Engagement Ring 006-807
The Kohinoor Duetto Black Rock engagement ring is a striking and bold alternative to a traditional gold ring. This black engagement ring is 5 mm wide and features a textured surface. The surface pattern of the black Rock ring resembles the rough texture of a stone. The rings are handcrafted in Hämeenlinna, and the surface pattern of each ring is unique. The ring has a flat profile with a rounded inner surface. This Kohinoor ring is an excellent choice for a man's engagement ring. Due to the width of the ring band, it is recommended to choose a size half a number larger than your usual ring size to ensure a proper fit.
Zirconium is an element used in industry, but due to its durability, it is also a popular material for rings. Zirconium is a non-allergenic metal and does not contain nickel. A zirconium ring has a very hard surface, yet it is lighter than, for example, steel. Please note that it is not possible to resize a ring made of zirconium!
Kohinoor rings and diamond jewelry are handcrafted in Hämeenlinna at the Kultakeskus factory in Finland, with over a hundred years of experience. Kohinoor products have been awarded the Key Flag and Design from Finland symbols as a testament to Finnish work and design. All Kohinoor rings are available in white, yellow, or rose gold versions. If you cannot find the desired Kohinoor ring in the online store, please contact customer service.
- Material: zirconium
- Band width: 5.0 mm
- Band profile: flat, rounded inner surface
- Product number: 006-807
Free shipping for orders over 50 €
- Pickup from Posti 0.00 €
- Pickup from Posti parcel locker 0.00 €
Standard prices
- Posti home delivery 9.90 €
- Pickup from store 0.00 €
Fast and Free Delivery
We offer free and insured delivery for all ring orders over €50. In-stock items are shipped quickly, while made-to-order rings typically take about 1-2 weeks.
Flexible Payment Methods – Buy Now, Pay in Installments
Purchasing a more valuable diamond ring is effortless with flexible invoice and installment payment options. You can choose the monthly installment that suits you best. MobilePay, card payments, and secure online banking are also available.
Finnish Family Business and Brick-and-Mortar Stores
We are a Finnish family business and serve you with expertise online and in our stores in Kamppi, Helsinki, and Tammisto, Vantaa. You can also pick up your order for free from our store, where our experts can assist with ring finishing or size verification if needed.
Authentic Materials and Official Warranty
We are an authorized reseller for all our brands. Every ring is delivered in its original box with an official manufacturer's warranty and certificate of authenticity. You can trust that the materials and any gemstones in your ring are exactly what we promise.

