|Minerals are naturally occurring, inorganic solids that have a definite composition and crystal structure. In order to be classified as a mineral, a substance must have all five of these characteristics. Minerals come from magma, or molten rock. When magma cools, crystals are formed. If magma cools fast, small crystals form. If magma cools slowly, large crystals are made. If the magma moves to the surface and cools too fast, no crystals form. Certain properties are used to identify minerals. Some are visible to the naked eye and others require tests. These properties are luster, hardness, color, streak, cleavage and crystal shape. Minerals can be refined to have a variety of uses, such as making jewelry, salt, dyes, ceramics, cosmetics, and technology. Use the above information to answer the questions. Select the best answer from the choices.