(0.1 inch (2.8 mm) presence is a powerful jacket! Smoked curb chain. This chain necklace has been oxidized (smoked) to give it a pretty neat finish. You can also match it with the top of a hard brand, and it also looks cool even with a chain alone. Oxidized processing is deliberately oxidized using a special process. This process creates a vintage feel and creates a slightly different depth. You can enjoy an antique feel that you cannot find in regular silver.