Myths, folklore, and symbolism
Coffins: One of the pardoxes of folk medicine is that objects connected with death are deemed curative. In several parts of England, from the late 18th century to the end of the 19th, there are references to rings made out of 'the handles of decayed coffins', or their hinges, or their lead lining, worn to prevent cramp, fits, or rheumatism. In Shropshire, the ring was 'made of three rings taken from three coffins out of three several churchyards.' (Oxford Dictionary of English Folklore)
Do you know any tales of coffin (and other death-related items) as curative from other countries?