Hematite Necklace I Had A Magnetic Hematite Necklace That I Wore With A Red T-shirt. It Was A Hot Day Out And I Was Sweating.?

I had a magnetic hematite necklace that I wore with a red t-shirt. It was a hot day out and I was sweating.? - hematite necklace

I realized when I was a red T-shirt was in the magnetic part of the chain. I have the chain again, I bought a new one. In the event happens again, how can the red pigment of the magnetic part of the chain?