I'm afraid I have to agree with Callum, what thing are you hopping to make disappear? I can't think of any way of making anything instantly disappearing however perhaps you might be after a form of banishing spell? I'm can't say for certain until you clarify the question a bit more
i meant that-
if u have something that is very special 2 u and that u don't want others to see it, in case if someone was about to find it , how to make that thing invisible so that person dosen't see it
i hope it's clear now
I would recommend hiding it somewhere safe or even better buy a safe to keep it in, you could try a few spells but why risk something precious on casting ability and the word of another practitioner you have never physically met when you could guarantee its safety, but that's my personal advice you may not choose to follow it, that is your decision.