Two-Tone Blue and Silver Tungsten Ring

This item is a modern tungsten ring, featuring a distinctive two-tone design. The main body of the ring is a deep, rich blue color with a matte or brushed finish, occupying the majority of its width. Along the top and bottom edges, there is a contrasting silver-toned band, appearing to be polished or satin finished, creating a clean, defined border. The ring has a flat, band-style profile, approximately 8-10mm in width, and a thickness that suggests durability, typical of tungsten carbide rings. The interior of the ring also appears to be finished in the same dark blue. Given the properties of tungsten, it is highly resistant to scratching and wear, a quality indicator for modern jewelry. There are no visible chips, significant scratches, or damage on the exterior, suggesting it is in very good to excellent condition. There are no discernible maker's marks or signatures visible in the provided image. Based on the contemporary design and material, it is likely a relatively modern piece, estimated to be from the 21st century. The 'three keys' context is unclear from the image alone, but 'size ten and a half' indicates a specific finger size, which is a common men's ring size.