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In addition, it must be hard and durable. Its value increases if it is also rare.The beauty of a gem is measured in terms of its clarity, brilliance, and color. Comments
Properties of Minerals. The following physical properties of minerals can be easily used to identify a mineral: 1  Color. 2  Streak. 3  Hardness. 4  Cleavage or Fracture. 5  Crystalline Structure. 6  Diaphaneity or Amount of Transparency. 7  Tenacity.8  Magnetism.9  Luster. 10  Odor. 11  Taste. 12  Specific Gravity.he following physical properties of minerals can be easily used to identify a mineral: 1  Color. 2  Streak. 3  Hardness. 4  Cleavage or Fracture. 5  Crystalline Structure. 6  Diaphaneity or Amount of Transparency. 7  Tenacity. 8  Magnetism. 9  Luster. 10  Odor. 11  Taste. 12  Specific Gravity.