Here is the problem I have with trying to use masterwork tools generically,
A masterwork item is an item that by its great craftwork provides a "better" bonus than an item that is not masterwork. It is something that has a use for the given task that is made better by its fine craftmansship.
So, what use do these gems provide for the task at hand? What I mean is, what would a set of non-masterwork gems provide for the task at hand?
Can non exceptional quality gems be used for a spellcraft check?
IMO if a non-exceptional quality item has no intrensic value to a task then an item of masterwork quality can't make the task any better.
Masterwork instruments can still be used to perform (it is impossible to make a lyre performance without a lyre).
Craft tools work the same way.
The list continues on.
I think it is a real stretch to apply the generic masterwork tool to perform a task that doesn't gain a benefit (even if only to negate a penalty) by using a non-exceptional quality tool.
A masterwork item is an item that by its great craftwork provides a "better" bonus than an item that is not masterwork. It is something that has a use for the given task that is made better by its fine craftmansship.
So, what use do these gems provide for the task at hand? What I mean is, what would a set of non-masterwork gems provide for the task at hand?
Can non exceptional quality gems be used for a spellcraft check?
IMO if a non-exceptional quality item has no intrensic value to a task then an item of masterwork quality can't make the task any better.
Masterwork instruments can still be used to perform (it is impossible to make a lyre performance without a lyre).
Craft tools work the same way.
The list continues on.
I think it is a real stretch to apply the generic masterwork tool to perform a task that doesn't gain a benefit (even if only to negate a penalty) by using a non-exceptional quality tool.