What makes an object is a perennial question.
I can remember my physics professors bringing it up in a really big way when I was still just a freshman in college. They always cautioned us then about extrapolating our everyday intuitions about everyday objects beyond their native realms.
Anyone who has been graced or grazed by a modicum of process thinking, say Whitehead or Bucky Fuller, is aware of the trade-off between process thinking and product thinking that rules our descriptions of every domain of phenomena, but in a retrograde time like the one we are currently experiencing it takes a mighty effort to recollect the way that hidebound objects are precipitated from more primal processes.
Here’s an old post I happened on that may apply here: