Cobalt-chrome (CoCr) consists of chrome, cobalt and is, in this case, nickel free. It is a metal alloy that has outstanding strength and corrosion resistance.
- It is biocompatible, cobalt-chrome is often used for making dental and orthopedic implants, as well as finger rings.
- Slightly lighter than steel, the weight of cobalt chrome is comparable to titanium, which makes it well suited to wear in piercings where the weight of the jewelry is a concern.
- When well-polished it has a color and mirror-like sheen that resembles precious metals like white gold or platinum. Unlike those precious metals, however, cobalt chrome's high resistance to wear means that it does not require a protective layer of rhodium plating, and it will retain its polish and premium color over time.
Sizes 10g and larger have a small gap by the hinge (see photo). Larger sizes require tools to both close the ring securely and may require them to open the ring.
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