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.
First, a rock is composed of one or more minerals and sometimes mineraloids but do not have a crystal structure. A mineral is a chemical substance made up of one or more chemicals having a definite crystal structure.Rocks do not have a definite chemical composition whereas minerals do.ommon Characteristics. Although there may be many differences between rocks and minerals, there are only a few similarities between them. Rocks as well as minerals are found in the Earth's crust (the outer layer of the Earth).