Abu Dawud Book 16, Hadith Number 3345.

Narated By Fudalah ibn Ubayd : The Prophet (PBUH) was brought a necklace in which there were gold and pearls.

(The narrators AbuBakr and (Ahmad) Ibn Mani’ said: The pearls were set with gold in it, and a man bought it for nine or seven dinars.)

The Prophet (PBUH) said: (It must not be sold) till the contents are considered separately. The narrator said: He returned it till the contents were considered separately. The narrator Ibn Asa said: By this I intended trade.