Jeweller Pandora has said it will switch from using silver in some of its ranges to platinum-plating following a dramatic increase in prices.

Silver has seen its price more than double over the past year, with other precious metal prices also surging.

Pandora's chief executive said its aim was not to make all jewellery platinum-plated, but silver will be reduced to around 25% of its offerings as it seeks to reduce its exposure to the metal given the recent price volatility.

The Danish firm, one of the world's biggest jewellery retailers, currently makes the majority of its jewellery from silver.

Although platinum is more expensive than silver per ounce, Pandora says it will create an alloy, which would make it cheaper to use.