"On the Day of Khaibar I purchased a necklace that contained gold and jewels for twelve Dinar. I separated it and found that it was worth more than twelve Dinar. I mentioned that to the Prophet ﷺ and he said: 'Do not sell it until it is separated.'"  

اشْتَرَيْتُ يَوْمَ خَيْبَرَ قِلاَدَةً بِاثْنَىْ عَشَرَ دِينَارًا فِيهَا ذَهَبٌ وَخَرَزٌ فَفَصَّلْتُهَا فَوَجَدْتُ فِيهَا أَكْثَرَ مِنِ اثْنَىْ عَشَرَ دِينَارًا فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ﷺ فَقَالَ لاَ تُبَاعُ حَتَّى تُفَصَّلَ  

] This Hadith is Hasan Sahih. This is acted upon according to some of the people of knowledge among the Companions of the Prophet ﷺ and others. They did not think that an embellished (silver-gilded) sword could be sold for Dirham, nor a silver-plated waist-band, or something similar, until it (the silver) was distinguished and separated. This is the view of Ibn al-Mubarak, Ash-Shafi'i, Ahmad and Ishaq. Some of the people of knowledge, among the Companions of the Prophet ﷺ and others, permitted that.