Answer:
The most fabulous way to locate pots of gold
An artΒ-form and its colour-ful result.
I can be as thin as a picture frame but my insides have many things you can see.
If you have me, you want to tell me. If you tell me, you don't have me.
A young man wants to have it, but when he has it he no longer wants it. Blade in hand he attacks it And does his best to remove it. Yet he knows that it is all in vain.
Some try to hide some try to cheat. But time will show we always will meet. Try as you might to guess my name. I promise you'll know when you I do claim.