I'm curious if a Sphere of Annihilation would survive an Antimagic Field, because at first you would assume that, based on the spell's entry,
A 10-foot-radius invisible sphere of antimagic surrounds you. This area is divorced from the magical energy that suffuses the multiverse.
Magic items: The properties and powers of magic items are suppressed in the sphere... the magic of the item ceases to be suppressed as soon as it exits. (PHB, 213-214)
then moving the Sphere into the Field would make it wink out of existence, and then once the field was moved or ended, the sphere would pop back into existence.
However, the wording in the sphere's description makes me wonder if it would still function. Specifically, it says
This 2-foot-diameter black sphere is a hole in the multiverse, hovering in space and stabilized by a magical field surrounding it. (DMG, 201)
Since the item is a magically stabilized hole in the multiverse, it would be reasonable to say that the hole itself is not affected by the "magical energy that suffuses the multiverse", as it is a hole in said multiverse.
Thus, the only "magic" in the item is the sphere of magic that stabilizes the hole. This would also be supported by the later section
If the sphere comes into contact with a planar portal... or an extradimensional space..." (DMG 201)
Then one of the three following things happens
The sphere is destroyed.
The sphere moves through the portal or into the extradimensional space.
A spatial rift sends each creature and object with in 180 feet of the sphere, including the sphere, to a random plane of existence. (DMG, 201)
To me, this would be explained by the inter-dimensional/planar travel possibly messing up the stabilizing field, either causing it to stop and the hole seals itself up, or destabilizing the hole just long enough to cause a spatial rift to tear open.
Going off of this, would an Antimagic Field hitting a Sphere of Annhilitation's magical field cause one of those two things to happen?