The share price of West Perth-based Anvil Mining Ltd closed down 11.3 per cent as a review by the government of the Democratic Republic of Congo into the nation's 61 mining contracts is due to be handed to the country's mines minister today.

The share price of West Perth-based Anvil Mining Ltd closed down 11.3 per cent as a review by the government of the Democratic Republic of Congo into the nation's 61 mining contracts is due to be handed to the country's mines minister today.