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What did you learn from doing this activity at the museum? Gems and Minerals in the World Around Us Try This Out: With your family, look around your house and list the minerals that you find and their uses. Museum - School Connections As you walk through the Gems and Mineral Hall, record your observations in the chart below: Why do you think the museum organized the minerals in the exhibit this way? Answers may vary. What is the difference between a rock and a Name of Mineral Picture of Mineral mineral? Your Observations MINERALS Pure (made of the same substance) Made of crystals Crystals have a definite shape ROCKS Made of more than one mineral Not the same color throughout, normally Classified by its formation process What properties are used to identify minerals? Hardness, cleavage, fracture, color, density, transparency, refraction, diffraction, luster, interference, and tarnish