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2. It is how it breaks when irregular planes are involved.
3. It measures a mineral's resistance to scratching.
6. It is the specific geometric arrangement of atoms that some minerals exhibit.
7. It is the color of its powder when scratched against a hard surface. It can be different from the color of the mineral.
1. It refers to how a mineral reflects light.
2. It is the mass of a mineral per unit volume.
5. It is the tendency of a mineral to break along specific planes.
6. It is the most noticeable features. Some minerals can have variations of it.