Narrated Fadala bin 'Ubaid (RA):

I bought a necklace for twelve Dinars at the battle of Khaibar and it contained gold and gems. I considered them separately and found that it was worth more than twelve Dinars. I told the Prophet (ﷺ) about that and he said, "It must not be sold till the contents are considered separately." [Reported by Muslim].

وَعَنْ فَضَالَةَ بْنِ عُبَيْدٍ ‏- رضى الله عنه ‏- قَالَ: { اِشْتَرَيْتُ يَوْمَ خَيْبَرَ قِلَادَةً بِاِثْنَيْ عَشَرَ دِينَاراً, فِيهَا ذَهَبٌ وَخَرَزٌ، فَفَصَلْتُهَا [1]‏ فَوَجَدْتُ فِيهَا أَكْثَرَ مِنْ اِثْنَيْ عَشَرَ دِينَاراً, فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-فَقَالَ: " لَا تُبَاعُ حَتَّى تُفْصَلَ } رَوَاهُ مُسْلِمٌ [2]‏ .‏