Isma'il bin Smy' إسماعيل بن سميع · The Book of Adornment

"I heard Ibn 'Umar say: 'The Messenger of Allah forbade wearing gold unless it is broken (into smaller pieces).'"

His nose was cut off at the battle of Al-Kulab during the Jahiliyyah, so he wore a nose made of silver, but it began to rot, so the Prophet told him to wear a nose made of gold.

"His nose had been cut off at the battle of Al-Kulab during the Jahiliyyah, so he wore a nose made of silver, but it began to rot on him, so the Prophet told him to wear a nose made of gold."