أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا مُوسَى بْنُ دَاوُدَ، قَالَ حَدَّثَنَا زُهَيْرُ بْنُ مُعَاوِيَةَ، عَنْ حُمَيْدٍ، عَنْ أَنَسٍ، قَالَ كَانَ خَاتَمُ النَّبِيِّ صلى الله عليه وسلم مِنْ فِضَّةٍ فَصُّهُ مِنْهُ ‏.‏

It was narrated that Anas said: "The ring of the Prophet [SAW] was made of silver and its stone (Fass) was made of silver too." Translation Not Available

Book Ref: Sunan An Nisai Book 48 Hadith 5200
Web Ref:  Sunan An Nisai Vol 6 Book 48 Hadith 5203