Thrift Store Mystery: Asian urn style vase with geometric designs and rough lava like glaze

Got this vase at a thrift store this past summer. I was immediately drawn to it's geometric shapes and intertesting color combination. It has the rough lava like glaze in the brown, green and blue. Repeating wave/water pattern over the whole vase. The mark on the bottom is a red circle with either a number or character inside. Everything seems to point to it being an Asian vase, but the pattern on the outside has me thrown a bit.