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.
There are five characteristics that an Earth material must possess in order to be considered a mineral. Although what the book says is generally correct, I prefer my way of stating these characteristics. Please learn the five characteristics of a mineral as stated below. For any earth material to be considered a mineral, it must exhibit ALL of the following characteristics: a. It must be naturally occurring. b. It must be inorganic (was never alive). c. It must be a solid. d. It must be crystalline; and all samples of the same mineral must have the same crystalline structure. e. It must possess a definite chemical composition; and different samples of the same mineral may vary in chemical composition only within specified narrow limits. Clarification of Terms