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.
Non-defining physical properties or characteristics of minerals include: hardness, luster, cleavage, crystal structure, chemical formula, streak, radioactivity, refraction, magnetism, and pleochroism.on-defining physical properties or characteristics of minerals include: hardness, luster, cleavage, crystal structure, chemical formula, streak, radioactivity, refraction, magnetism, and pleochroism.