Upper limits on materia melding

[Hayward]

After doing some materia melding this weekend (on my MRD armor, mostly out of curiosity), I now know there's an upper limit for stats. What I'm not certain of is the actual maximums for each stat per armor tier. Any explanation will help so I don't waste gil on materia I can't use.

[Raldo]

It varies based on item level, item slot, and in rare cases, the intended class type (mage or non-mage) assigned to use it. You're going to need to get specific, otherwise the list is very long.

[Vortok]

Rule of thumb: If it's combat gear you can't meld much more, if any, of stats already on it. If it's gatherer or crafting gear, it's the reverse so you generally meld more of what's already on the gear.

[ImDingDing]

tricks, the caps of a stat is equal to the stat on another HQ gear of the same tier.
example, vit on HQ amber earrings is 6 and it's capped. so if u try a tier 4 vit on HQ zircon earrings u will see it is also capped at +6 (u dont have to finish the meld to see the cap, dont waste it)