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.
Diabase or dolerite-an intrusive mafic rock forming dykes or sills. Diorite-a coarse-grained intermediate plutonic rock composed of plagioclase, pyroxene and/or amphibole. Dunite-a phaneritic ultramafic rock composed of more than 90% olivine, usually forsteritic.