Cobalt has the look and feel of white gold and is a bright, white metal that is even brighter than titanium and tungsten. It is sometimes referred to as ‘cobalt chrome’ and compared to platinum and palladium in colour. Its silvery radiance is completely natural and cobalt itself is often used in electroplating to give other metal based jewellery a polished surface.
Its brilliant shine makes it extremely popular to manufacture rings and being heavier than titanium but lighter than tungsten, cobalt rings create a balance that is comfortable to wear. It is highly scratch resistant and doesn’t chip, shatter or crack; it’s also four times harder than platinum and five times harder than gold. It will retain its shape but is almost impossible to re-size, only tolerating minor adjustments.
Similarly to platinum and palladium, cobalt contains hypoallergenic properties.
Its silvery radiance is completely natural so it doesn't require any plating and over time, it won't fade, discolour or tarnish. But like all precious metals, although it is resistant to scratching, it isn't scratch-proof, so ensure you keep it away from hard objects and other jewellery.
Cobalt can be cleaned with warm water and dish soap and dried with a soft cloth to shine. It is suggested that you take your cobalt ring to your local H.Samuel store every few years for a buff and polish to maintain its original lustre.
Here's an interesting fact – it's name is derived from the German word 'Kobalt', which is translated to ‘Goblin.’ Cobalt is found as a by product of copper and nickel mining, so miners gave cobalt-ore this name because they were superstitious about mining the ore.