General synonyms:
* Valuables
* Possessions
* Assets
* Wealth
* Riches
* Jewels
* Gems
* Goods
* Prize possessions
More specific synonyms, depending on the type of treasure:
* Relics (for historical or cultural treasures)
* Artifacts (for ancient or historical objects)
* Memorabilia (for items with sentimental value)
* Keepsakes (for small, treasured items)
* Hoard (for a large collection of valuables)
* Loot (for stolen or plundered goods)
Figurative synonyms:
* Gems (for something that is very valuable or precious)
* Gold (for something that is very valuable or precious)
* Diamonds (for something that is very rare or precious)
* Gifts (for something that is very special or cherished)
The best synonym will depend on the specific context in which you are using the word "treasures."