You are asking if this is a native american pottery item? is that it?
A little background on where you obtained this item would be helpful.
If its native american I would say its not ancient. That a judgement call from the photographs. its virtually impossible to determine 100% authenticity from a photograph, but I have not seen an authentic native american ancient pottery with a glaze finish.
A tourist trade or modern native american would likely be a known maker with a makers mark - possibly, not always.
My gut feeling is not native american. If so, not old.
Nice color and design. Symmetric an well painted.