This word is both countable and uncountable. Treasure, as a noun, has the meanings of gold and silver treasures, jewels, wealth, extremely valuable items, treasures, treasures, treasures, beloved (or cherished) people, sweetheart and so on.

Treasure is an uncountable noun, meaning treasure, and treasure can also be used as a countable noun, meaning "treasure, treasure (especially works of art and cultural relics)"