central heating - a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators
exists and is an alternate of . Five physical characteristics of a mineral are: hardness, luster, diaphaneity, colour, and streak.
Mineral Properties. A mineral is a naturally-occurring, inorganic solid which possesses a characteristic internal atomic structure and a definite chemical composition. If we take the definition of a mineral term by term, it becomes easier to understand: Substances that have these features will also have distinctive physical properties such as color, crystal form, cleavage, luster, streak, etc. You can find out more about minerals by clicking on the buttons on the right.