Fadala bin Ubaid (may Allah be pleased with him) says: On the day of Khaybar, I bought a necklace for twelve dinars, in which gold and gems were embedded. When I broke it apart and separated them, I found that I got more than twelve dinars from it. I mentioned this to the Prophet (peace and blessings of Allah be upon him), and he said: "(Necklaces in which gold and gems are embedded) should not be sold until they are separated." Similarly, the author has narrated a hadith from Qutaybah with the same chain of narration. Imam Tirmidhi says:
1- This hadith is Hasan Sahih (good and authentic).
2- Some of the companions and other scholars among the people of knowledge have acted upon this. These people do not consider it permissible to sell a sword or belt inlaid with silver or other similar things for dirhams until the silver is separated from them. This is also the opinion of Ibn al-Mubarak, Shafi'i, Ahmad, and Ishaq bin Rahwayh.
3- And some of the companions and other scholars among the people of knowledge have permitted it.