The Prophet ﷺ had a ring made of silver, with its stone also made from silver.
أخبرنا أبو بكر بن علي قال حدثنا أمية بن بسطام قال حدثنا معتمر قال سمعت حميدا
أن النبي ﷺ كان خاتمه من ورق فصه منه
No references are available.
Bukhari reported it in the Book of Clothing, chapter on the stone of the ring, hadith no. 5870, from the hadith of Mutamir bin Sulayman with this chain, and it is in Kubra, no. 9517.