The materials.

In a matter of amulets and talismans, the materials are very important, as they help angels to be close to us, and ideally they should be made of a metal, such as iron, gold, silver, titanium, etc. an organic material, such as mainly wood and leather, since an amulet helps an angel to stay longer in a certain place or to locate that place quickly, so that metals and materials of organic origin have better qualities of attraction for his psychic magnetism. As for evil talismans, what they do is capture a spirit, but as soon as the talisman is burned, the spirit is released and turns against the one who captured it.