As per p.325: Treasures either cost a Glamour point to activate and then give a fixed effect; or they rely on a Glamour or Intelligence + Gremayre roll if purely magical in effect; or they rely on the normal mundane dicepool to use if it's, for example, a pen or a sword.

Then some examples are given. Some of these are automatic, or require Glamour to activate. Some, like Vulcan's Hammer, require an activation roll which grants automatic extra damage. It's not clear whether this means you roll Glamour or Intelligence + Gremayre first, adding each success as automatic health levels...