Sunan Abi Dawud 4216
سنن أبي داود#4216SahihNarrated Anas:The signet-ring of the Prophet (ﷺ) was of silver with an Abyssinian stone
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (5868) Sahih Muslim (2094)
In-book reference: 36:3