Hadith #5209 (Sunan al-Nasa'i)
Book: The Book of Adornment
Narrator(s): al-'Awwam bin Hushab العوام بن حوشب بن يزيد, Anas ibn Malik, Azhar bin Rashid al-Hwzny أزهر بن راشد الهوزني, Hashaym bin Bashayr bin al-Qasim هشيم بن بشير بن القاسم, Mjahd bin Musa مجاهد بن موسى

“The ring of the Prophet  was made of silver and its stone (Fass) was made of silver too.”

Source: https://parallelquran.com/hadith/sunan-al-nasai-5209/