Chilean President Sebastian Pinera has presented UK Prime Minister David Cameron with a rock brought up in the pocket of one of the 33 miners rescued from 700 metres below ground.
In return, he will take home a bottle of beer and a copy of Robinson Crusoe for each man, which was set on a desert island off the coast of Chile.
Pinera is on the London leg of his European tour which was organised before the San José mine saga began to unfold.
Back in Chile, Camp Hope has now been dismantled, but there are still many people at the San José site. Miners and their families say they are owed severance pay and are angry that the accident was allowed to happen at all.
Pinera has said the mine’s owners were to blame for the accident, as they had not followed safety guidelines adequately. He has also said the government will ensure that standards are met in the future.