Ash-Shama'il Al-Muhammadiyah, Book 12, Hadith 89 (In-Book)

Hazrat Anas radiallahu anhu reports that Rasululah sallallahu alayhe wasallam had a ring made of silver and its (inlaid) gem was also of silver

حَدَّثَنَا مَحْمُودُ بْنُ غَيْلانَ، قَالَ‏:‏ حَدَّثَنَا حَفْصُ بْنُ عُمَرَ بْنِ عُبَيْدٍ هُوَ الطَّنَافِسِيُّ، قَالَ‏:‏ حَدَّثَنَا زُهَيْرٌ أَبُو خَيْثَمَةَ، عَنْ حُمَيْدٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ‏:‏ كَانَ خَاتَمُ رَسُولِ اللهِ صلى الله عليه وسلم، مِنْ فِضَّةٍ، فَصُّهُ مِنْهُ‏.‏

also referenced under: Book 11, Hadith 84 (English)