Cut it out then put a skim coat of mud over it.
Sandpaper
Get superglue debonder.
Best practices dictate that you take your gemstone to a local jeweler who may be able to help you remove the superglue.
Use acetone. If you don't have acetone, use nail polish remover. It has acetone in it.
Dr. Harry Coover invented superglue in 1942.
yes if you have framed unfinished walls, measure then deduct finish such as sheetrock
Because it is easier to build walls with it.
When you want smooth walls that are easy to finish.
Sandpaper
that's a way to remove blisters, once you get superglue on it, and peel it off, your blister is gone
Putting plastic over the stud walls before sheetrock is not recommended. The moisture will be trapped between the sheetrock and plastic and the home will not breathe.
Insulation and sheetrock are related only in the sense that they are used in walls. When one side is drywalled insulation batts can be stuffed in the other side and then boarded up.
Try some fingernail polish remover.
You cannot use sheetrock as flooring, period. If you meant on a wall, there is no reason you cannot put sheetrock over tiles. The question is why would you want to! Why not remove tiles and material behind, which is probably sheetrock, and then install new sheetrock. If it is an area prone to moisture you could use moisture resistant sheetrock. The job would look better and you would not lose the space by adding over existing material.
Get superglue debonder.
Best practices dictate that you take your gemstone to a local jeweler who may be able to help you remove the superglue.
You either have to have it plastered or you can go a less expensive route and use drywall mud to give it some texture.