Good to see the almighty appraisal cheat skill having a negative effect. Such an ability really should cause harm to the user considering it crams tons of information into the user's mind. Though, of COURSE it was a cursed piece of jewelry.
That necklace must be pretty important if she doesn't take it off when sleeping... So, either someone important to her gave it to her with the curse already in it, or someone placed the cursed on it because they know she wouldn't take it off...
Ummm...... that's a very simple problem to resolve..... ya see....... when the mc destroyed the bed and recreated it, it become a normal bed without the skills...... so the same can be done to the necklace and the skills will also vanish..... i think he can destroy and rebuild it tho