The gold in the gold necklace is not REAL. To someone a gold bar is just a yellow hard stuff whereas to others it is a precious metal. Gold is an idea created to distinguish metals. Gold Necklace is an idea created to distinguish it from other jewelry pieces. These ideas are results of our conditioning. Ideas are not real since they can be changed. What is real is the MIND where the ideas are created. MIND is there but ideas come and go. The empty space that we call sky is there but clouds come and go.