Cobalt is a highly durable alloy with a hardness four times that of platinum, yet it has a lower density. Due to its natural hardness, cobalt jewelry offers exceptional scratch resistance, resistance to breaking, and corrosion. The lower density of cobalt gives it natural malleability, allowing for the creation of designs that are lightweight, robust, and dynamic. Cobalt also has hypoallergenic properties, making it an ideal choice for those with sensitive skin or an active lifestyle.
At Blue Nile, we offer two finishes: a deep black and a natural, lustrous white, both of which maintain a lifetime shine. The color of cobalt resembles that of platinum, requiring no rhodium plating and never losing its luster.
Cobalt Jewelry
Elemental Properties of Cobalt
Chemical Symbol = Co Atomic Number = 27
Care and Polishing
While highly scratch-resistant, all metals naturally exhibit wear patterns over time. If cobalt jewelry does get scratched, it can be repaired.
Shop our cobalt jewelry collection.