Answer:
There are approximately 4000 different minerals, and each of those minerals has a unique set of physical properties. These include: color, streak, hardness, luster, diaphaneity, specific gravity, cleavage, fracture, magnetism, solubility, and many more. These physical properties are useful for identifying minerals.
Examples include quartz, feldspar minerals, calcite, sulfur and the clay minerals such as kaolinite and smectite.