Fafitikar neman Zinariya a Minna

Workers pack rock samples into a bag at a mine in Minna, Niger State.

Workers look up from one of the pits of a mine, believed to contain gold, in Minna, Niger State.

Workers use sacks filled with soil to reinforce a mine in Minna, Niger State.

Crushed rock samples, that is thought to contain gold, is washed at a mine in Minna, Niger State.

A Teapot and cups used by miners are placed on the ground at a mine in Minna, Niger State June 23, 2013. Picture taken June 23, 2013. REUTERS/Afolabi Sotunde (NIGERIA - Tags: ENERGY BUSINESS EMPLOYMENT SOCIETY) - RTX10YTL

Labourers work at a mine in Minna, Niger State.

Labourers work at one of the pits of a gold mine in Minna, Niger State.

A man crushes rock samples in a bowl before testing them for gold at a mine in Minna, Niger State.

A home is built by a mine in Minna, Niger State.

Workers use sacks filled with soil to reinforce a mine in Minna, Niger State.