Many people 'coaching' have no idea what coaching is as they haven't been trained or haven't been coached by a professionally trained and credentialed coach. There are 'schools' that will offer a credential after three hours of training and people read a book or watch a TV program and decide 'I'm a coach!'.
The most magnetic and common type is a lodestone. It consists of a brownish-black mineral called magnetite. Lodestones are natural compasses: Suspend one by a thread or wire and it will rotate until its magnetic field is aligned with Earthâs magnetic field. A magnetic field is the area around a material in which its magnetic forces can be detected.
Magnetite lodestone for studying magnetism and rock and mineral properties in classroom demonstrations and experiments Iron oxide mineral with the highest iron content and strongest magnetic properties of any mineral