Achieving a "half-mask" on a ring shaped Image object so other Images can jump through it

As the title describes, I'm trying to somehow allow object to "fall through" an Image object using a ring shaped sprite. Right now it looks like they just fall over the object, so I need to mask half of the ring to achieve the effect I'm looking for. Can this be done with a Sprite Mask somehow? I have never used the object and I'm unsure how they work. I came up with a solution of splitting the Image in 2 to apply different sort layers to both, but eventually I want to animate the ring and it would be easier if it was 1 object.

 

I think splitting the sprite into 2 sprites is best. You can still animate it by grouping them together under an empty GameObject (and animating that).