I recently had a Pathfinder random treasure generator create a mithral studded leather. This doesn't make sense to me since, quoting from the mithral section of d20pfsrd we see,
Items not primarily of metal are not meaningfully affected by being partially made of mithral. (A longsword can be a mithral weapon, while a quarterstaff cannot.)
Combined with the entry for studded leather,
Similar to leather armor, this suit is reinforced with small metal studs.
This reads to me like the metal studs, while crucial to the design, are not the primary material. Much like how banded mail uses leather as a support structure, it is primarily metal. As such, it should not be able to benefit from the special properties of mithral.
Allegedly, the random treasure chart in the GMG has one roll on the metal chart if studded leather comes up, which would seem to indicate that studded leather would qualify for mithral's properties. Unfortunately, I do not have access to the GMG for validation.
Would mithral studded leather be awarded the special properties (decrease in spell failure, armor check, and weight, increase to max dex)? Is there any clear guidance on this?