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.
As found in the Encyclopedia Britannica, 1999 Sometime in the 12th century, mariners in China and Europe made the discovery, apparently independently, that a piece of lodestone, a naturally occurring magnetic ore, when floated on a stick in water, tends to align itself so as to point in the direction of the polestar.